WaSalaam..
This is your second post. So I looked up your first post, many months ago. I remember reading that post and really don't know what to comment on it. Hope that is solved for you.
While it is good that you are aware of the rights and wrongs, if you live pretty much off the grid and self sustainable, you're sorted. Otherwise, the money system already has all the elements of haram. It is not half measures. Haram is haram. Can there be something less haram than another?
Personally, as a father myself, and islam as my faith, banks and money my way of exchanging my earnings for funding my household, in the most acceptable way, if my son tells me he's afraid that he is eating what he feels to be of haram earnings, I'm not sure if my reaction would be a good one.
I say go out, earn yourself a living, and reconsider your thoughts when you've got a growing family. That would be the nicest thing I could say.
My suggestion is to concentrate on your studies, eat from what your dad provides, be charitable yourself for his sake, that Allah can wash clean whatever that is associated with your concern. Remember, charity does not necessarily mean with money.
When you are done with education, get out there, into the real world and practice the lifestyle you prefer.
May Allah keep you in His Guidance. Ameen.
P.s. I didn't welcome you as you did not introduce yourself. So belated welcome and do partake more often.
Hope it has been good so far..

eace: