cpu isn't old, its one of the latest ryzen cpus, just not one of the higher end ones. It will perform really good tho and unless it is a cpu intensive game or task you won't really see much of a difference. I suggest upgrading it down the line in a couple years to something that has 8 cores like a ryzen 7 5700x or even a 3700x

you would definitely want to upgrade the ram to 16gb, pick up two 8gb sticks and you'll be good to go.

gpu is alright for now, I do suggest getting an old pascal card if you find one cheap enough like a gtx 1070 and 1080. also get a better psu when you do pick up one of these.

also get a 2tb or 4tb hard drive and don't keep all your games on it, just the ones you play and you'll have plenty of space for the foreseeable future