I keep getting my ass handed to me no matter what. I keep either getting one shot of the enemy just won’t die. How do I stop being garbage at this game?

So, I've recently started playing Valorant, it's a nice game ngl, but one thing that's sad/disappointing is the apparent lack of skins earned throught gameplay (like ranked play or xp) I couldn't find anything about it on the web, so I'm co...