Im an 11 year old girl who alredy went through pubrerty and my voice got deeper and I want to become a singer/actress and I want to know if that will change anything in my dream of singing and acting.

Nothing at all, but do you have any talent at all ?

I assume that you will sing songs in your new voice range.
Were you hoping to postpone puberty forever?
A lot of what makes a good singer is heart and soul, "feeling", usually a matter of maturity.
(You are the only one who knows how your dreams are affected.)

You sing at the level your voice is, there are women with high voices, women with very low voices, all can be singers, not all sing the same types of songs.