@cool_boy_mew RTX 9060XT would be good for what you would use it for. And AMD has plug and play drivers for linux for the GPU.
So far the only bottleneck I see in the system would be the Sata 3 SSD. Your board should have gen4 or gen5 nvme slots. Even a cheap Gen 3 NVME drive would be 3x faster than a sata 3 ssd.