So this is your first vehicle? My advice, Leave it alone if it runs reliably.
If you want it to last on a budget, at least if it runs good, don't use it for anything but a daily driver.
Modify nothing but minor things until you get a feel for her AND have the finances to modify and make other modifications,.
Once you commit, she WILL require them .
Any modifications you may want to make WILL take you down a deep and very expensive rabbit hole.
Modify one thing, and EVERYTHING else will want it's own turn in line...$$$
Just the voice of experience.
Small steps, Grasshopper, small steps.