Other than a clear protective film for rock chips (and maybe a CQuartz coating) I'm not planning on doing anything to the car. I've never been much of a fan of modifying high end cars - went through that phase in my 20s with Japanese cars, it ended up always costing me too much money and leaving me disappointed at the result after a short time. This car is just way too nice on it's own to mess with in my opinion. My major learning opportunity in those days (early 90's) came from a highly modified Mazda 323 GTX that would bark flame if you shifted it right, sounded like all 4 tires were being simultaneously slashed when you shifted it (blow off valve) and had the engine burst into flames (and destroy itself) once because the boost ran away on me...oh, and the transmission blew up the day I was delivering it to it's new owner. But I digress...

If you insist on doing stuff, I'd stick to parts from the major suppliers (Evannex, TSportline, etc) and go easy to begin with. As far as window tint any automotive tinting shop should be able to help you out. For darker wheels you could have the stockers painted, powder coated, or "Plasti-dipped". The latter is popular because it can be removed easily leaving the original finish intact. I'm sure given your location there are lots of places you could get it done, or do yourself if you're somewhat handy. The same places should be able to wrap the piano black interior pieces if you don't like them. There will also be lots of nice aftermarket wheels available in darker colors as well - and I suspect Tesla isn't done with their offerings.

 

Window tint, carbon fiber lug covers for the sport wheels, possible carbon fiber interior trim (want to see the wood in person first).

Really not much else, I love the car as is.

The only thing I don’t love is ride height, but I don’t think I’ll touch suspension.

 

look thru these two threads. Lots of ideas of what has been discussed for customization, protection, accessories, etc.
https://teslaownersonline.com/threads/what-will-you-do-to-your-new-m3-after-delivery.4914/
https://teslaownersonline.com/threads/what-model-3-accessories-would-you-like-to-see.4845/

 

T Sportline generally has good service and they are local for you (in West Hollywood)! They tend to align their products for plug and play. For example, their wheels will fit your factory parts. Their cosmetic parts will go directly on to your factory bumpers and body too.