So I have not spent enough time doing EV calculations away from the table. Although I am able to do the simple ones, I never learned how to calculate in these situations. I have a few questions. Sorry if this is something that's already been covered extensively.

The situation was: 6max, two limps, I pot in CO, BN shoves for 12.4 BB (with very wide range), BB + limpers call. I bet 20BB on flop, two players call (BB folds). UTG shoves 78.8 BB

This is an unusual situation but it happens from time to time, would be good to get some feedback not just regarding this player but also what you might do against other player types.

CO: 70.4BB
BN: 95.8BB
SB (Villain): 241BB
EP(Hero): 105.9BB

Hero has A♣️4♣️T♠️Q♦️

Preflop
Hero raises 3.5BB, fold, CO calls, BN calls, SB calls, fold

Flop (15BB) T♣️ 8♥️ A♦️
SB checks, Hero bets 15BB, CO calls, fold, SB call

Seat 1: - (€9.70)
Seat 2: - (€20.51)
Seat 3: Villain [BB] (€39.03)
Seat 4: - (€10.47)
Seat 5: Hero [MP] (€45.02)
Seat 6: [CO] (€9.71)

Hero has A♣️ 9♣️ A♥️ 6♥️

*** Preflop ***
fold
Hero raises to €0.35
CO calls €0.35
-fold-
-fold-
Villain raises to €1.45
Hero raises to €4.75
-fold-
Villain calls €3.30

Flop (€9.60) 7♣️ 6♦︎ 2♥️

Villain checks
Hero bets €7.20
Villain calls €7.20

Turn (€23.57) 9♦︎
Villain bets €24.30
He