Same advice I give everyone asking this question:
1) Good quality barrel, 1:8" or 1:7", 18-20", rifle length gas, "National Match" profile with 0.750" gas block. This keeps the overall weight down, but still with enough forward balance to give you stability on the sticks in the field. Black Hole Weaponry and Kreiger are my "go to" companies for AR barrels.
2) Good quality trigger. Rock River Arms NM or Varminter 2 Stage, with JP yellow springs, Geiselle G2S-E, or NM 2 stage (very expensive, well worth the cost). Triggers don't make rifles more accurate, triggers make rifles more shootable.
3) Free float handguard. It's a coyote rifle, you'll be shooting from various field positions, you need a float tube. I've been very happy with the Troy Alpha Rail and VERY VERY happy with the Midwest Gen 3 Mlok rails.
4) Adjustable Gas Block & H2 buffer. The H2 buffer slows down your unlock time and spreads out your recoil impulse, making the rifle a lot nicer to your brass, a lot easier on its own action, and much easier to manage for follow up shots. The Adjustable Gas Block gives you ultimate control over your cycle, again, to minimize battering of the action, and to ensure reliable function with a broad spectrum of loads. Any old H2 buffer is fine, I usually either buy Colt or Kaw Valley. Most of my builds are JP gas blocks. Odin & SLR are fine as well, but I prefer clamp on type, rather than set screw type, and the JP is lower cost. At Greg's advice, I did buy a BTE last year which has been great. You can't GIVE me a "bleed-off" gas block, so I'm a hard pass on the Superlative.
5) Building your first AR isn't always a good idea. A) If you run into a functional issue between particular parts, the solution might not be readily apparent to the inexperienced. B) You might order parts which aren't compatible, simply because you didn't realize they weren't. C) You might not realize what you really want in your AR, so something which looks good or is highly recommended online might not hit the mark with you (Magpul Bad Lever is one for me - absolutely no use for the thing. I have a couple, but I really just don't have need or use for it). I always recommend "builds" over factory rifles. A better idea might be to either hire a builder like Ritch, OR, find a guy who will help you build it. This can't just be that dude at work who owns a Magpul armorers wrench. If he can't clearly and concisely describe the firing sequence of the FCG, he's not the right guy.
I've done "get to know your new AR classes" with 1st time AR builders for several years, usually one on one or small group. I work with the guys to gather the parts, then they come to my place, build the rifle, tune it, then get instruction on operation and do some live fire instruction. There are guys like me all around, if you look under a few rocks, you'll find them.