TL;DR: I'm thinking about asking for a desktop computer for Christmas and I kinda need some advice
For the past 5-6 years, the practicality of a laptop has been worth the drawbacks. Now, as I start to do things which require more power from a computer, it seems to be becoming a bottleneck rather than freeing.
I know very little about things like motherboards, power supplies, anything AMD, and desktops in general 
so I figure it's not worth building one from scratch for me
What's a good desktop? I'm looking to get something better than my laptop (16 gb RAM, i7-12700…k?, laptop RTX 3060, 1 TB SSD) and I have a lot of money saved from never participating in capitalism (I don't want to spend a butt load of $$$ on this though).
Does anyone have any advice? Should I get a prebuilt? Assemble it myself? Try AMD parts (not sure about this though)?
Just trying here before I dive into… Reddit 
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As I've started diving more into 3D animation (especially anything with simulations) and game design, I've found that my computer can't quite keep up. When I render my photo real animations, I get hit with constraints on quality quickly. Also, if I'm being honest, I think creating a computer/upgrading it myself also sounds like a very rewarding thing to do. The hard thing with a prebuilt is that I don't have all the information on the computer on hand, but a self-built seems like a massive undertaking