small problems

hy, i am new to online holdem, since august this year,... i do not no much, but i learn and try to play always by the book.... the thing is that even playing like this, at cash tables i kind of lose all the time.... i dont know if its my fault, playing badly or i am just unlucky... so i will post a few questions...

is it wrong to call an all-in on a flop with flush and/or straight draws when your hand is top 2 pair at least? (EX. you have KsQd on the flop : KcQh4h)

how about A7 on a flop like A73? should i bet it hard, even go all in?

is it ok to call any bet if the pot odds are good even if you lose?

Ak on a flop like K 10 6... how shoul i play this hand?



how should i play overpair on the flop? ex: QQ on a 793 flop? should i bet and if reraised fold?

i lose mostly to these situations... so please answer my quoestions. thank you.