If I were you, I would, before planning any surgery, work on the resonance and infelction and all that other stuff. It is well possible that if you get these things working, which do not change with surgery anyways, your voice could be naturally female sounding. If it does not, you still can add surgery to increase pitch a bit, but I personally think that the main issue is those other parameters. I would try to invest some money in a good personal voice training and/or do some of the online courses, but since these are two different things - surgery/pitch and resonance/inflection/melody and both have to be adressed independently, you should not be held back by the thought of having surgery from training those other things. If you can reach 220 Hz *easily*, you are already way into female range there and this is all that surgery could do for you, bring you in that range - it cannot correct the other issues, so focus on them first. The only thing I heard about resonance in terms of surgery is Dr Thomas - he seems to try to adress this issue as well in patients who absolutely cannot do that by themselves, but his procedure is very invasive.