Thanks to everyone who posted in
I now have a temporary build planned. My main aim is to maximise value for money, so although I named some pretty undemanding games as targets for this build, they are just the games that caught my attention while not paying attention to what's being released on the pc, and I do also want to be able to explore the current game library and have some breathing room moving forwards.
My plan is to look for deals on black friday/after Christmas and get the parts as cheap as possible. If I understand correctly I can just add more ram and/or a SSD whenever I want so there's no need to buy those now.