Will definitely look into it, did upgrade to a 750W gold PSU for the GPU
you should have plenty of power with that psu, cpu should be your next focus. if you are trying to stay budget freindly, try and reuse your mobo, any ryzen 5000 cpu should work but the 5600x is kind of a sweet spot for price/performance.
4060 is a decent card and gives you that sweet ray tracing, but does cost a few frames if you want to use it. imo, not worth it, its pretty for some screenshots in some games, but playing with it on is pointless. a stronger cpu with a 4060 should get you 1440p 60hz no propblem, if your target is higher than this, the card will hold you back.
if you have the extra dimm slots on your mobo, adding to your ram rather than replacing it is a valid option, but ram is a minimal improvement overall, you pretty much either have enough or you dont. if you have enough, you dont "need" to change it. AMD can be a bit tricky if you dont have a full "ram kit", the best advice if you have to mix match it, is make sure all sticks are set to the same frequency and timings through the BIOS (if youre comfortable with doing this, otherwise buy a full kit and skip the hassle).
ive been building pc's for over 20yrs, feel free to PM me with specific questions, ill try and give you the most unbias answers possible. i do have bias opinions on somethings but keep those reserved.