What kind of CPU/RAM can I get?

Do you still need assistance?

1150 socket CPU's would be hard to come by now, that socket was superseded.
in fact, I think the 4th gen range was the last one they did for the 1150's.

you may end up having to get as new motherboard as well. and that in turn will force the memory to be DDR4.
and your PSU is inadequate for that GPU.
your 4th gen Intel Core processor is 8 years old.

and ignoring all that, going from a 4th gen to whatever the highest gen is for the 1150 chip ends up being, will add a few more threads and cores, maybe a slight clock speed increase but whether you'd notice any speed improvement would be doubtful.
you already have a SSD which is the best performance boost you can give any PC.

overall you are trying to run current era software on old era hardware.
and the gap is only increasing.
there comes a time when the old girl needs to be retired to lesser, mundane duties like NAS server, Home theater, CCTV recorder, or kids gaming unit and the money better spent on a replacement.

(sorry to rain on your parade)

Thread closed due to lack of any feedback from the OP.