In terms of face-value reading, the "ethics" of Chapter I and II read as diametrically opposed to one another. If they were ethical systems, they would be opposed to one another.
They only make sense together in terms of doing one's Will. That's the only way they align, and it's different for each person. In this sense, I think Thelemic ethics are entirely situational ethics, with their main reference point being the Will of the individual in a particular situation.
Regarding the valuation of different Wills, there is no difference. Regarding the restriction of my individual Will in favor of anything else, damn them.
So, all things being equal, you are perfectly free to do your Will. In fact, that's the only right thing to do.
My stuttering two.