Unfortunately, with those specs, you're going to be limited in what you can play. Here's the breakdown:
Focus on titles that are older and less demanding. You can find some great first-person shooters and RPGs from the early 2000s that might run on your system:
Some indie games are very well-optimized and can run on older hardware. Check out websites like Steam and itch.io for games with low system requirements.
You could try emulating older consoles like PlayStation 2 or GameCube, which have a wealth of great first-person shooters and RPGs.
Important Note: Even with older games, you might need to adjust graphics settings to low or very low to achieve playable frame rates.