Breastfeeding question/tips for me please

I want to exclusively breastfeed. But I’m worried that my milk supply will drop. I heard that the more the baby eats the more milk my breasts will make but what if the baby ends up sleeping longer some days/nights? I’m worried if that happens than my milk supply will drop if baby is a good sleeper. Do I have to pump? Should I pump? I know I should use a haakaa if I have over supply the first couple weeks when my milk supply comes in because breast milk will start leaking out and you want to collect that milk. But let’s say my breast milk regulates to how much baby baby needs and I don’t have milk engorgement anymore and baby sleeps longer than usual or starts to sleep well during the night… should I be pumping? I don’t want to lose milk supply. Idk I’m really worried and confused someone please help me with your tips and thought!!