Sorry to have to say that (so often) but the fact is, all your points have been dealt with
in great detail previously, including the one about "and has kept me from having any sexual partners" which is simply completely
false. If you cannot retract when flaccid, then there is no risk of accidental retraction when erect and if you can masturbate (come on! - do - tell me otherwise!

), then you can have sex -
if you have a loving partner with whom you are
not trying to "prove" yourself in some way.
Moving forward, you have apparently by now some understanding of the two fundamental "exercises" involved and you simply need to begin
doing both, not in a tentative way but with determination - and
persistence to make it work. Yes, get two fingers inside, get them all the way in through the tight part so that you can "hook" them in there so they do not slip out, and do the stretching. Also the frænulum stretch. You may not realise now that you need it, but you you
most likely do and it certainly will do no harm.
Forget the Glansie - you can already do better with your fingers. Do certainly consider the
GFS as Jim describes but do start with the fingers method
right now and simply
do it instead of ruminating on why it is so apparently difficult.
Correct about US doctors - I couldn't guarantee the competence of doctors from other countries in this area, suffice to say that it's not something doctors do well and
particularly so in the US. But the betamethasone
ointment would be helpful.