I'm going to enter thean art university in this spring, so I need to much money. I'm going to enter an art university in this spring, so I need much money.

Use 'an' art university because you didn't specify which university

I'm going to enter thean art university in this spring, so I need to muchmore money. I'm going to enter an art university this spring, so I need more money.

Perhaps you also meant "I need to make money." Also, you can say "I'm going to enter art school" without any article; it is a general thing and you're not referring to any specific university.

I'm going to enter the art university in this spring, so I need to mucha lot more money. I'm going to enter art university this spring, so I need a lot more money.

But working part-time jobI cannot earn much money working a part-time, and students usually don't have much time. But I cannot earn much money working a part-time, and students usually don't have much time.

But working a part-time job cannowon't earn me much money, and students usually don't have mucha lot of time. But working a part-time job won't earn me much money, and students usually don't have a lot of time.

But working part-time job cannot earndoesn't give much money, and students usually don't have much time. But working part-time doesn't give much money, and students usually don't have much time.

We often just say "part-time" or "full-time" by itself in sentences like this. "Do you have a full-time job? - No, I'm just working part-time at the bakery."

I want to earn money and improve my art skills at the same time, so I tried to start SNS for accepting illustrations commission. I want to earn money and improve my art skills at the same time, so I tried to start SNS for accepting illustrations commission.

Did you start it? If so, ... I started SNS Or, are you still trying to figure it out? - in this case, your version is fine

I want to earn andwhile improveing my art skills at the same time, so I tried to start SNS for accepting commissions for illustrations commissionon SNS. I want to earn while improving my art skills at the same time, so I tried to start accepting commissions for illustrations on SNS.

I'm American so not 100% sure if "on SNS" is the correct way to incorporate the word SNS (we say "social media"). But I would reword that phrase.

I want to earn and improve my art skills at the same time, so I tried to start SNS for acceptingso I could accept commissions for illustrations commission. I want to earn and improve my art skills at the same time, so I tried to start SNS so I could accept commissions for illustrations.

It's painful. It's painful.

I don't like SNS. I don't like SNS.

Moreover, anyone neverno one watches me. Moreover, no one watches me.

Moreover, anyno one never watches me. Moreover, no one ever watches me.

Moreover, anyone nnobody ever watches me. Moreover, nobody ever watches me.

"Moreover" is pretty fancy. I might just say "also".

Maybe I'llve spent so longtoo much time to get it to works. Maybe I've spent too much time to get it to work.

Maybe I'll spent sohave to spend a long time to get works. Maybe I'll have to spend a long time to get work.

(Maybe I'll spent so long time to get works.)? (Maybe I'll spent so long time to get works.)?

This sentence confuses me a lot. If the "I'll" was "I've", then I could see it as: "Maybe I've spent too long writing. Time to get to work." Or, maybe: "How long is it going to take for me to get a job?" I'm not exactly sure what you meant by this sentence.