Don't buy a lot of add-ons for your rifle before getting a lot of practice in. Practice, then you'll find out what you want. If you have any friends with ARs, try something different to see if there are other features that peak your interest. Ask a lot of questions here on INGO but put your flame suit on first. Sometimes people get carried away.
RUN IT WET, as in plenty of lube on the BCG.
Sorry, but what is the "BCG" (My learning curve)?
Bolt carrier group
Like many said above. Learn how to properly field strip it, clean it and operate it safely. Then shoot it a lot before you buy any add ons. In fact learn the iron sights first then and only then do you need to think about an optic, and you may not want one at that point. Be very careful what mags you buy. MagPul mags are cheap and work wonderfully. Avoid UTG, Tapco or other bargain stuff, they suck in the long run. Avoid well used USGI mags until you learn how to inspect them.
Thanks so much for the advice, I did buy 3 extra Magpul 30 rd. mags, have 4 total now. At the advice of an "experienced AR guy", I had a Vortex Red/Green Dot installed and bore sighted on my Sig M400, perhaps my bad? I have watched several You Tube vids. on field stripping and cleaning, seems pretty straight forward from a newbie point of view. As far as operation goes, should I enlist an instructor or someone with experience on this weapon for an IOE or would a good general background in firearms and safety suffice?
Nothing wrong with an optic, since you have it just take it off for a while to learn using your irons, or turn it off if it only works when turned on. The AR is not complicated, but it is a professionals weapon. And by that I mean, you have to treat it the way a true professional treats his stuff, take care of it before yourself. Intruction wouldn't hurt at all, but you can do that yourself if you are detail minded.