I think it's hard to get your head round how different it is to ff. A lot is about perception too. I'm a determined person and work with very challenging children so I could easily apply that mental attitude to the issues I encountered.
It's an organic process; more milk is made the more that is taken. Worried about weight can sometimes make you loose confidence but there are lots of things that can be done to help this. Latch is so important so getting feeds observed by peer supporters can help with many issues.
Don't assume that it's going to be the same - a baby's mouth and latch changes as they grow and you need to revisit your latch positions.
I had a lot of problems with over supply due to bad expressing advice (only pump what you need!!) and very strong let down that my baby couldn't deal with, plus he had a posterior tt and until quite old was just a baby who choked on things a lot! That was hard but I persevered to find out the problems.
Some women find the way you are completely joined at the hip due to bf the hard bit - but that's normal.
I was embarrassed out and about when I could only get a good latch lying down - I put too much pressure on myself to keep up with the women traipsing round all the baby classes. I guess I had that upright feeding idea in my head - best positions are often where the mother is lying back on a soft couch with lots of pillows. That got better after a tongue tie cut.
Some women and babies have no issues at all. A lact consultant did tell me any issues are usually due to the baby's ability to keep a latch and stimulate the breast; not the mothers as long as she's working on positioning for a good latch. As they get older a lot improves as they just get better at it. But there are so many resources on the internet to help - la leche league, Kelly mom and Dr Jack Newman's videos on latch are really handy.
Phone for advice, talk to people on help lines and local fb groups etc.
If you're in the north there's an enormous fb peer support community I can put you in touch with who also meet regularly in real life.
The food of love is a brilliant book by the way.