New to breastfeeding

My son is almost 3 weeks old and I've been exclusively breastfeeding him. I still don't really know what I'm doing. I do know he's getting enough because he's pooping enough and wetting enough diapers and he's gaining weight. I mainly feed on demand. When he gets fussy and shows cues I feed him but he's constantly eating and only eats for about 10 minutes at a time. I'm starting to think he should be on a schedule. Should he be on one? How would I get him to get on a schedule?

Also any tips to get him to latch? He kind of roots around and sticks his hands in the way and just makes a mess before he actually latches and starts eating. I've given up on having clean shirts 😂