Baby woes, need some facts?

i dont have ne babies yet, but thats all i ever wanted. i always wanted to be a mommy, but i knew to wait for the right time and person, so the life would be better for the kid. im 23, married and have a nice 3 bedroom house. every month i go through baby with draws. i want a baby so badly and i know id be a good mom. and everyone wants for me to get pregnant like everyones looking forward to it including my husband, i brought up going off the pill and he said ok. the reason im waiting is because i wanna get a reduction and get through beauty school first. but i really want a baby, and not just a baby but the whole thing baby toddler elementary all of it. i want to be a mom. id like to know how hard it really is to have a baby and go to school. the whole reason i even want to go to school is so i can make enough to work part time and be home with the kids more. how expensive they are and everything. just any advice is great! thanks!