[Carlos]

Hand 1:
Preflop I either raise or fold mainly depending on my chances of bying the button and getting it heads up.

I don't like the turn check since it will often leave you with a difficult river decision. Use your position and bet the turn as the last money you put into the pot. If you're willing to invest 3 sb on the flop you should be willing to invest another bb to get a showdown.

I don't know what to make of the flop 3-bet. These combination hands are tough.

Hand 2:
You lost the absolute minimum. Even though it's impossible to read this kind of player it's important to keep on valuebetting your good hands against them. Bad and mediocre hands are much more common that good hands.

Carlos