I ran away at 18 about a year ago. I need help on Taxes

I know, its super silly and idiotic. It’s my fault I didn’t learn these things but Im now here to find out.

I am unemployed- and haven’t had my first job yet but I’m about to work online.
I will begin having an income but it will be under the title of ‘Self employed’. Apparently i will have to state my own taxes or something because of this? …

I have no idea where to go, where to begin, who to contact.
How do my taxes reach me? How do I pay them? How do I know how much to pay? Is it online, is it at the DMV?

And this is the movement I realize I’m probably on the wrong website for this kind of question. But please consider answering! Im really desperate.

Yes this is the wrong website for this type of question!

Try asking here https://www.reddit.com/r/personalfinance/

There would be many people there that could help.