this might be so wrong, so be warned!!!!!!
I perhaps would not worry about type, perhaps asume your type 1, (as you need insulin)
test blood
do fasting ie first thing in am without eating, if its normal ie 4.00 - say6-7, then you may not need long acting as you say, if you eat and the sugar rises then you can treat with a bit (measured units) of the fast acting you choose.
there is a guide to how much insulin is needed for how many carbs you eat, but people are different so it is a guide, you unfortunatley can omly learn by trial
if you dont need long acting insulin, thats a major bonus so only need fast acting when you eat, should learn to adjust fast acting dose prior to eating, test blood prior to eating, if its higher than normal take this into account then plus the carbs your about to eat, calculate dose and JAB, then 2 hours after eating check levels agin and the result should guide you when you eat the same again.
hope that makes some kind of sense and is not patronising, its ment in good will,
I am not a DB professional, your clinic nurse, consultant, GP should help officially, though try not to worry re exact diagnosis, its your blood sugars and there treatment to bring them to normal limits that really matter (in my opinion)
best wishes