If you know how to tinker with the components and will be able to replace them then I think:
- get an SSD drive. Keep HDD for storage, but install system, software and put all images you are editing there
- get more RAM. Best - fill it up to max of you system possibilities but aim for 16 GB (4x4 or 2x8 depending on number of slots on you motherboard)
- replace CPU with one that has better multicore performance and lots more internal cache. FX-8300 or better. It will work on your current motherboard
- get good cooling. Box cooling for FX is so so, so ask for something at the store, beQuiet is making pretty good ones and not really expensive
- install everything from scrap. If needed get box Windows and install it so that there is not crapware running in the background
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If you do not want/know how to tinker in the case then perhaps there is someone here who lives nearby and can help?
if you want a new setup, here is my proposition:
System Builder - Ryzen 7 2700 3.2 GHz 8-Core, Radeon RX 5700 8 GB MECH OC, Pure Base 500 ATX Mid Tower - PCPartPicker