All depends on what direction you want to go with this car. Pretty much every mod available is straight forward except for engine mods (internal mods at least bolt on stuff is dummy proof).
The easiest?
Door lock and check rm covers (black plastic) from ebay. Maybe not necessary, but I like the finished look it gives it, and it's seriously a 30 second install
nice lights, but that stripe you have on the front fender let me warn you....i did a similar stripe like the with some vinyl.... and a few months later i got bored of it and when i removed it, it left a bad mark on the paint and it left a bad tan because the paint was covered.....it looks cool no doubt, but just warning u..i have the slate color..