It is ok to be an independent witch. I think you should learn and master all of the basics here on this site, alone ( it wouldn't hurt you ).
And then when it comes to something hard or specific like astral projecting or something like that, you should ask for a teacher.
What about your father ? Did he know she was Wicca ? If so, shouldn't he know at least a little ?
If those questions comes out too nosy or you don't want to talk about it. it's fine.
Blessed be ! ^^