Clueless mom who needs help for a young gamer please

Hello everyone,

my son \[9\] has been begging me for PC for 2 years now. He's a good kid and a good gamer and I really would love to make his dream come true but everybody I ask keeps telling me I need to spend thousands of dollars if I want something half-decent for him to play on?

I am not that familiar with PCs. I know RAM prices have gone up but that's it. Money is tight so I was beginning to look for beginners PCs but tbh I am overwhelmed. I played sims 20 years ago and even managed to mod it, I am not completely lost when it comes to managing a PC and I can google and follow instructions.

But I have literally no clue what to get him that will play his games fluently and that will last a few years or even can be upgraded. Would you just buy the cheaper PC and then get a new one in a couple of years? Or should I invest some more money and be able to upgrade it later? I would appreciate your help so much!

EDIT: he plays Fortnite, Minecraft and Roblox but lately has been asking to explore other games such as Skyrim or Star Wars.

(Sorry for any weird sounding sentences English is not my native language.)