Definitely try to post more reads on the villains involved.

Hand 1 looks like a bet/fold, or a check/fold if you don't think you have the discipline to not bet/call a shove. The obvious draws got there. Definitely raise the flop and raise it big, villain isn't going anywhere if they have an ace, 6 or overpair. If villain doesn't have anything they can continue with you were only going to win a small pot anyway, and if one of the biggest leaks at these stakes are people call/chase too much, start taxing as early in the hand as you can.

Hand 2 fold preflop, this is such a high variance spot and you're going to be lost on so many flops. As played either check back flop or bet smaller, bet/folding the turn to avoid river spots like this - if you're raised you can fold, and villain may check the river to you allowing you to show down for free. Betting the flop smaller would also let you bet less on the turn than your chosen bet would have meant. Without reads I fold the river and don't feel too bad about it, we just don't know enough to call.