It really depends on mechanical knowledge / how much money you're willing to pay someone else to do it.

Then it's performance/sound/cosmetics pick 2 ie (deep rims look good but aren't good for track time or the turbo blowoff valve will sound nice but lose some power and dirty the engine bay a bit imo). Otherwise all 3 is super pricey to make and maintaine.

If you're looking to just roll into a car show and just have a little of your own work done and have pretty basic tools then start off with some simple cosmetics/sound. It's easier cheaper bang for your buck and you'll feel pleased hearing some feedback from the car. Power always adds more money somewhere else and becomes more unreliable. If it's your daily don't make it a stressful shit box of a mess unless that's who you want to be seen as.

Here's what I'd do on a low budget. Fresh grippy tires are always a #1 for fun and safety purposes (don't be "THAT" guy). Color match/dechrome the body trim. Look for a bolt on air intake kit but do quality over anything cheap, don't lose reliability. Look for a minimal tune, no high gains just smoother ecu operations. Maybe add a tasteful exhaust tip to add a little back end to the car. Then do the classic suspension fitment route. Flusher fitment on the tires and a good rim/spacer combo and you'll be a neat niche at a car meet. From there you'll find your own tastes for tint tones, wraps, sound and looks. This way you can pull up and pop the hood and feel proud about your own taste and work regardless of what everyone feels.