So I didn’t buy any new parts for my ender 3 pro but I had to print a few things before I could print with any kind of consistency.

1. Bed screw locks. My bed would drift away from where I leveled it. This would cause it to fail on larger prints a lot
2. A filament roller with bearings. The rolls always seemed to have trouble pulling filament
3. Direct drive (Satansa?) for the extruder so it didn’t need to push and pull through that long tube
4. I already had this but a spark plug feeler gauge and moving the zAxis is the what i’ve found to be the best way to level your bed. I like .7mm for this

All of these should probably work with yours, not sure if you still have it. If not make sure you have a caliper and make adjustments in your slicer or tinkercad or just do a lil post processing