Just getting into online poker. Played live limit games mostly but I'm making a stab at NL - Any advice is appreciated and thanks.

Winning Poker Network (Yatahay) - $0.50 NL - Holdem - 7 players
Hand converted by PokerTracker 4

UTG: 100 BB (VPIP: 25.19, PFR: 17.53, 3Bet Preflop: 7.25, Hands: 1,307)
Hero (UTG+1): 266.56 BB
MP: 125.74 BB (VPIP: 16.48, PFR: 12.71, 3Bet Preflop: 4.42, Hands: 1,073)
CO: 114.48 BB (VPIP: 16.38, PFR: 13.59, 3Bet Preflop: 2.59, Hands: 292)
BTN: 117.9 BB (VPIP: 21.25, PFR: 17.03, 3Bet Preflop: 6.49, Hands: 2,205)
SB: 102 BB (VPIP: 20.28, PFR: 15.74, 3Bet Preflop: 8.00, Hands: 576)
BB: 90.62 BB (VPIP: 16.75, PFR: 10.58, 3Bet Preflop: 3.94, Hands: 1,664)

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has Q A

fold, Hero raises to 3.5 BB, fold, CO calls 3.5 BB, fold, fold, fold

Flop: (8.5 BB, 2 players) A A 9
Hero bets 6.06 BB, CO calls 6.06 BB

Turn: (20.62 BB, 2 players) 4
Hero bets 14.7 BB, CO calls 14.7 BB

River: (50.02 BB, 2 players) K
Hero checks, CO bets 90.22 BB and is all-in, Hero calls 90.22 BB

Sizings seem a little big. I don't understand the logic for checking river, you're still ahead of his range and have a lot of value vs Ax and he could hero call some 9x/PP.

However once you check and he jams 2x pot this is sort of a snap fold. You have a range advantage, even if you shouldn't check the nuts on the river his line is ridiculously strong, he has like maybe 2/3 combos of xxdd as a bluff and you don't beat any value bet when he goes for that sizing and 2.5% 3-bet pre means he has bunch of AK combos.

Yeah i'm betting 3bb on this flop, then 5 ott. That makes the river pot approximately 25bb instead of 50. Once you bet ott, what does v have? Most pairs would have folded by now. Maybe KK, QQ sticks around for 1 or 2 bets... I might still bet otr bc he almost surely doesn't have AK, KK, but i'm betting maybe 8bb to get a sticky pair to call because my bet sizes would more likely keep them in. Once he shoves, i'm done.