If you want to play games, then Debian isn’t that good of a choice because of the outdated packages. I’d suggest getting a new SSD though. Your HDD is already pretty old and slow and could potentially fail soon, so you might as well get some fresh storage. Makes it easy to test distros too until you found something satisfactory, at which point you can transfer over your old data and eventually format your old HDD into some sort of backup drive I guess.