Have baby no.2 or not?!

Okay girls I already have a 19monthold and am 23 have a bf also! So he wants another child and am debating weither to have one or not! I want one but the fact we still renting a house and am not qualified in my field of study yet and don't have a proper job so that would b my only worry that I would find it harder to finish my college with 2 children instead of 1., I want my child to have a sibling though but I just keeping going back and forth do I just need to bite the bullet or wait a year!! Help another perspective always helps