Just started messing around with stocks/trading/contracts

I’m super confused on how I liquidate my contract winnings into my account. Could somebody please explain. I’ve read multiple different routes via google but all the steps I read, it’s not here on my app when trying. I read that the funds have to be liquidated per date for event contracts, but does that mean my earnings or the event timers?

I just started last week trying to learn about stock trading and investing.