What advice would you give to your youngest self?

Don't waste your 20's working on open source until all hours of the night. Spend it building a software business.

slow down life. Take it as an experience to overcome

You need cash flow to make money.

Держись за тебя

Don't stop believin'.

"Stop skipping classes and party less".

I guess this advice would have to do with schooling. When I was going to go to medical school I had some difficulties. It was hard for me to study and write reports. I would probably recommend paying more attention to How to Write a Personal Statement for Medical School Getting a chance to go to college was difficult. And if I had known all the information, I would have gotten into college a lot sooner.

Never follow the trend. Listen and take advice only from experienced people.

Never take an office job, it's a trap: You get a paid a fraction of the value your create and the time you put in that 9-5 would be better spent building your own business/service/solution.

probably to not care what others are telling you to do and also to start following your passion earlier even if it is must 30 mins a day.