One day you’ll have the money for a desktop computer or a Steam Deck (don’t get a gaming laptop).
In the meantime, create accounts for Steam, Epic, and GOG. They do a lot of free giveaways for games. And you can add games that are already free (TF2, RuneScape, Counter-Strike) to your accounts as well. That way you’re building a library at no cost in preps for when you finally get a computer and can play them.
You don’t even need a computer to do what I just said. Steam has a storefront on its mobile app, and Epic and GOG are on the internet right now.