I Made $310 From a Udemy Course I Created in 4 Hours

Some side hustles sound exciting from day one.

3D printing?

Interesting.

Renting out tools?

Makes sense.

Building websites?

Sure.

Creating online courses?

Not a chance.

At least that's what I thought.

For the longest time, I assumed Udemy instructors were people with impressive credentials hanging on office walls. University professors. Industry veterans. People with twenty years of experience and enough knowledge to fill three books before breakfast.

In other words, not me.

So I never seriously considered creating a course.

Then something happened.

People kept asking me the same question.

Again.

And again.

And again.

The Side Hustle That Started It

As many readers already know, my most profitable side hustle is still AI-generated 3D models for 3D printing.

Over the last few years I've spent a ridiculous amount of time testing AI tools, generating models, fixing broken models, printing prototypes, learning what works, and discovering what absolutely does not work.

What felt normal to me started looking unusual to other people.

Eventually I noticed a pattern.

People kept asking:

"How do you do this?"

"What software are you using?"

"Can AI really create printable models?"

"How do you actually make money from it?"

At first I answered individually.

Then I answered again.

Then again.

And eventually a thought crossed my mind.

Maybe this could be a course.

Not because I was some world-class expert.

But because I knew more about this specific topic than the people asking the questions.

That's an important distinction.

You don't need to know everything.

You only need to know enough to help someone who's a few steps behind you.

My First Course

So I decided to try.

Worst case?

Nobody buys it.

Best case?

I learn something new.

The course covered how I use AI to generate 3D models for 3D printing and how that process fits into my side hustle experiments.

Nothing fancy.

No professional studio.

No expensive camera crew.

No Hollywood production budget.

Just me explaining what I actually do.

The entire process took around four hours.

Four.

That includes filming and editing.

Honestly, I've spent longer deciding what to watch on Netflix.

The Result

Then I published it.

And waited.

And waited some more.

Because that's how most online projects work.

You hit publish, stare at the dashboard, and immediately discover that the internet does not care about your masterpiece.

At least not yet.

But slowly, sales started appearing.

Not every day.

Not every week.

Just occasionally.

Little by little.

Over the last six months, that course has generated:

$310

Now, let's be realistic.

Nobody is retiring from $310.

But when I look at the numbers, something interesting stands out.

The work was done once.

The recording was done once.

The editing was done once.

The course was uploaded once.

And six months later, money is still arriving from something I created in a single afternoon.

That's a very different type of side hustle compared to hourly work.

The Strange Thing About Knowledge

I think many people underestimate what they know.

We spend so much time inside our own hobbies that we stop noticing which skills are valuable.

What feels obvious to you might feel impossible to someone else.

For me, generating AI models for 3D printing became normal.

I've spent years around it.

But for someone starting from scratch, it can feel like magic.

That's probably the biggest lesson I've learned from this experiment.

Sometimes the opportunity isn't learning something new.

Sometimes the opportunity is teaching something you already know.

Three More Experiments

The success of the first course convinced me to keep testing.

So during the last month I released three additional courses:

• AI app creation
• AI-assisted WordPress website creation
• Advanced AI 3D printing workflows

At the moment, all three have exactly the same revenue.

Zero.

A beautiful, perfectly round zero.

No enrollments yet.

No sales.

Nothing.

And honestly, that's completely fine.

I've been doing side hustle experiments long enough to know that one month means almost nothing.

Many projects spend months looking completely dead before showing signs of life.

Websites work like that.

YouTube channels work like that.

Courses often work like that too.

Will They Work?

I have no idea.

Seriously.

If there's one thing these experiments have taught me, it's that predictions are usually terrible.

I've had ideas that I thought would perform well completely flop.

And I've had ideas I expected nothing from surprise me.

So I'm treating these new courses exactly the same way I treat every other experiment.

Publish.

Wait.

Observe.

Track the results.

Then decide what to do next.

Maybe six months from now they'll still be sitting at zero.

Maybe one of them becomes my best-performing course.

We'll find out.

Current Verdict

For now, online course creation stays firmly in the "keep testing" category.

One course.

Four hours of work.

$310 earned over six months.

Three new courses recently launched.

Zero enrollments so far.

The numbers aren't life-changing.

But they're interesting.

And that's enough reason for me to continue the experiment.

As always, I'll keep tracking everything and sharing the results here on Kirimas.

Not financial advice. Just another real side hustle experiment, with real numbers and real outcomes.