I found when DD was a small baby (under 8 months or so) that she didn't feed much when we were out - too much other interesting stuff going on. So once we'd got into a pattern, i timed my trips out around her feeds. Or if i really needed to feed when out, I found somewhere quiet to do it, so that she would.
Of course, later on, she'd bounce onto my lap pull open my top, put her head inside, and roar 'BOOOOBS!' when she wanted to feed.
So that was clear.
But she was older then, over one. And i taught her she was only allowed to do that at home.
But back to you. You need to eat, drink and sleep well to support your milk supply. The time little babies feed for can vary A LOT. Books say 20-40mins is normal. Some can go for over an hour. DD would glug it down, even as a newborn, and i could rarely get her to feed for more than 10 minutes (possibly also because i have small boobs and a strong let down reflex so the milk would literally squirt into her mouth). That worried me a lot, but her weight gain was good, so needn't have.
Research online. there are great videos you can watch showing you how to get a good latch etc.
Don't expect it to be easy straight away. Its like learning to drive a car. Easy when you know how, but quite a complex skill which requires some time to master it, for both you and your baby.
YY to getting some in person support - NCT have breast feeding teachers and counsellors, there are also lots of independent breast feeding consultants.
Good luck! Mumsnet is also v knowledgable to do come on here with any worries and people will help.