Hello Lynker, This happened to me two years ago, I can remember the shock that I felt after what I thought was going to be a routine opticians appointment.
Firstly, don't worry about the laser treatment. It only takes a few minutes and is painless.
A bit later on I had surgery to widen the angles. It was done as part of cataract surgery, again painless.
Of course it does mean you will need to use eye drops, probably for the rest of your life and need regular checks at the eye hospital.
My pressures are much lower now and it has become part of my life and not that massive worry that it was when I was first told.
Good Luck 