some line checks to look over with you lovely people

wassup guys, 3 hands where im unsure as to what i should be doing, will be adding my thoughts beneath each hand thanks in advance for the feedback its very much appreciated!

PokerStars - €0.02 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4

BTN: 101.5 BB
SB: 110.5 BB
Hero (BB): 105 BB
UTG: 79 BB
MP: 122.5 BB
CO: 100 BB

SB posts SB 0.5 BB, Hero posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has A♥ A♣

UTG calls 1 BB, MP raises to 4 BB, fold, fold, fold, Hero raises to 12.5 BB, UTG calls 11.5 BB, MP calls 8.5 BB

Flop: (38 BB, 3 players) 6♥ 9♣ J♥
Hero bets 20 BB, fold, MP calls 20 BB

Turn: (78 BB, 2 players) T♥

wasnt really sure what to do here. with the spr i ruled out any kind of bet that wasn't all in, checking to give rope/sigh call might be an option but i thought theres lot of bad rivers for action.

my biggest problem was finding a hand that could call that i beat lol, AJs folds, QQ with a heart maybe, villain has flatted KK before did not know that at time of play. theres KQ straights, the flush and sets in villains range, obv going broke if they got me beat regardless just wondering what the way forward is here

PokerStars - €0.02 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4

BTN: 100.5 BB
SB: 885.5 BB
BB: 100 BB
UTG: 364 BB
Hero (MP): 225.5 BB
CO: 280 BB

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has A♣ 9♣

fold, Hero raises to 2.5 BB, fold, BTN calls 2.5 BB, fold, fold

Flop: (6.5 BB, 2 players) 7♥ 4♦ 8♠
Hero checks, BTN bets 3 BB, Hero calls 3 BB

Turn: (12.5 BB, 2 players) 6♥
Hero checks, BTN checks

River: (12.5 BB, 2 players) 3♠
Hero bets 14 BB,

not a great board for my range so checking to IP seems ideal, call seems fine, now i aint got sheeeeet

always struggled to put players like this on a range, dudes range is nutty as hell. 393 hands played with him hes 3bet JJ and just called with 66 and AKo, yes, ace king o, so god knows.

really dont have many 5s in my range so wasnt sure if this bluff was a good idea but i decided blocking the nuts i got ace high we gotta go for it

PokerStars - €0.02 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4

BTN: 93 BB
Hero (SB): 100 BB
BB: 238 BB
UTG: 52.5 BB
MP: 144 BB
CO: 117 BB

Hero posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has 9♥ 9♠

fold, fold, CO raises to 3.5 BB, fold, Hero raises to 12 BB, fold, CO calls 8.5 BB

Flop: (25 BB, 2 players) 2♣ 2♥ Q♠
Hero checks, CO bets 12 BB, Hero calls 12 BB

Turn: (49 BB, 2 players) 5♠
Hero checks, CO bets 23.5 BB, fold

never really sure what to do in these spots when i 3bet a pp and overcard comes so any advice on how to navitage these sort of spots would be much appreciated.

thanks all!