Get a 1TB NVME Gen 4 drive, the speedup is insane. (If you have a slot for it on your motherboard; use this as your OS drive)
Get another 16gb of PC3200 DDR4 that's as closely matched with your existing kit as possible.
and from there, only a GPU upgrade is needed to get you pretty close to the top. I still like the 3060 12gb; because I play games that require a lot of vram, but choice is yours here.
Yeah, all of those sound perfect - should keep things nice and cheap and the machine will feel way snappier.
Honestly we're reaching a point where 32gb of system RAM should be the default for most people. Especially for games.
You're already probably not CPU-bottlenecked on the GPU - while you're playing games, you should be sitting at 100% (or close) to GPU utilization.
If your GPU utilization never hits 100%; then you're CPU bottlenecked.