[codethief]

How much time do you have on your hands? And how long-term a commitment are you willing to make?

I'm asking because you don't learn these things over night. Gravity & geometry in particular take quite some time to digest and then there's quantum field theory which, in my opinion, takes even more time and is even harder to digest.

Also, how mathematically inclined are you? Does it bother you when things are not clearly and precisely defined?