Decide on a cpu and gpu in your budget for the gaming pc and make sure they match up/don’t bottleneck each other or your wasting money in one direction or the other. 

Get it built at a local pc shop if you can’t build on your own. Beyond those 2 parts the rest doesn’t matter and they will build it to match those


Check these videos for this years top choices 

https://youtu.be/zggNjikFRMQ?si=J8vzuOU-XGta39uh

https://youtu.be/EJGfQ5AgB3g?si=W61iWw6u6Z1QXHnc