I think the problem relates to the tight foreskin.
Once you have overcome this and desensitise the head
then you will feel more comfortable with orgasms.
You should always be able to roll the skin back to
clean and while washing rubbing with soap and clean off
with water should over time desenitise the area, you
could also leave the skin rolled back in your under wear for
short periods so the clans rub against the clothing.
Precum is a natural lube and should not cause you to have any problems.