Breastfeeding!

For all those mommas with babies already! (Or those who are curious and following) I'm 33 weeks and according to my webMD app I should have started leaking colostrum a few weeks ago. I haven't. I get clear fluid sometimes if I add pressure to my boobs, but that's it. Does this mean it's going to be harder for me to breastfeed? Will my milk supply be low? I REALLY want to breastfeed!! I'm worried my body won't make milk /: