Welcome to the addiction. Guarantee it's night & day different from the Avalanche, regarding off-road ability.
-Looks like you need a hood insert--this is a great place to try and find one.
-Same for wheels. Usually a few people selling some. I sold my 16" stockers a couple months ago--and those are never a bad option for anyone (rattle-can them black for looks). Alternately, find some aftermarket wheels that you like--but they'll probably cost a bit more. Stockers are a bit narrow though. Keep that in mind.
-Trim looks great overall, just a few blemishes in some areas. There's a few products that can help with the staining/streaking. Mother's Back-to-Black is great--but will need to be regularly re-applied. Or you can go full-bore and Line-X the cladding (or the entire thing, like Jo has).
-Oil up the leather interior about once per month. That should keep it looking great & stop it from drying/cracking over time. Shift-boot & steering-wheel too. Seat covers is always an option--if you want to keep the seats minty.
-Tint will also help with interior longevity.
-Stock sound in a VX is a bit lacking. Mine had an 8" bass-tube installed, and the difference is substantial. There's a few good write-ups on here that will help you with replacing the other speakers, if you choose to do so. The head-unit in mine was already replaced, and the USB input works fantastic with the Cruzer Ultra Fit 128 GB drive I have; you can barely even tell there's anything plugged into it.
-There is no cup-holder. The center-console is a drink LAUNCHER, not a holder. I'm going to be installing a single-din cupholder in my dash as a fix for this.
I'll let some of the off-road vets weigh in on mods for that stuff.