Now, lets say i'm already receiving benefits, this fact will affect my spouse's benefits too?
Not at all. Those benefits paid to you won't decrease your spouse's benefits. In fact, that could help your spouse  to decide if she wants to take her benefits earlier.
Thanks. Another thing, please. Could be my benefit amount be reduced if I begin to receive my benefits between age  62 and my full retirement age?
Certainly, it will. In that case the amount will be permanently reduced by a percentage based on the number of months up to you full retirement age.