I dont know what you mean by what kind of witch,Eclectic,perhaps?
As for your desires--
1)Helping the poor is a good thought,but magic cant do that kind of thing (unless its directed at a particular individual.)
2)I dont know about hurting people physically,but bad luck and banishment spells are a good way to go.
3)Bonding with nature and exploring isnt just a witch thing,its a dreamer thing,and its truly beautiful.
4)You can not use magic or anything else for that matter to alter your body,you can not change into anything,you can not grow anything,you are human and will be until death.
5)Well,If you want to interact with spirits,theres a good chance the ''bad kind'' will come knockin,so its good to study up on both good and bad spirits.
6)I dont know much about Hoo Doo or Voo Doo,but I do know you should do extreme amounts of studying and reasearching before attempting.
7)You can not use magic to go to other dimensions.But if your into that kinda thing,reasearch Astral Projection and Lucid Dreaming,as it has some aspects of the fiction of dimension travelling.
And in the end,a witch is a witch.You'll walk the path alone at times,and with others.But it is a beautiful path in the end.
Best Of Luck!