pcpartpicker.com is a good resource. You can see the community builds for inspiration at least. It also tells you about most incompabilities for your build, but it's best to check with someone so you won't get parts that do not work with each other.

Try setting a budget and looking for the GPU that fits within it, everything else more or less builds itself from there as you check the recommended CPU pairings and requirements they have on your other components.

I got an AMD ryzen 7 5700G CPU 8 cores 16 threads here. an AMD RX580 graphics card(very old card from 2017 but works amazing here. Modular 750 wats crosair power supply here. 16GB of ddr4 ram at 3200 mhz (any brand works don't worry) here. A gigabyte motherboard A520i here.. I picked a montech case mini tower here.

Edit: I already had the storage from a dell mini I had before this one. I now have 512 SSD for the root partition. 1 TB 2.5" SATA SSD for the home partition and a third 2TB 2.5" SATA SSD to store all my games on and for the steam library.