I would say everything looks pretty good for a first attempt!
Brisket: Pic a little dark, but looks fairly moist. Like the layered slices, but not sure the cut off ends help the appearance. And cutting off the ends will lose you some bark and flavor off the piece the judge will sample. Score 8. (as an aside since I don't pay attention to garnish, your garnish does frame the meat nicely.
Chicken: I think the picture color is a little off, so the chicken looks a little orange to me. The sauce looks a little blotchy, but isn't over sauced. Score maybe 7, most likely 8.
Pork: Looks nice, but is there chunks on left and right, pulled in center and slices top and bottom? If so it looks like you might be a little short for 6 judges to get pulled samples. It looks nice and moist and again not judging garnish, but the garnish looks pretty good. Score maybe 8, could be 9 at table.
Ribs: Score solid 9, not much else to say except I want 1 (or may all 8!) :clap: