Pumping questions

I just started pumping and i noticed a few problem

My penis has a pretty good bend up wards, so when I am erected even at 70% I won’t be able to fit my penis in the tube

Also I am uncut, When I pump, my foreskin gets pulled back, and there is a slight uncomfort

I am about 5 erect girth yet base is about 5.5 and I am using a 1 3/4 girth by 10 inch tube.