You're right, there's so much info. and advice out there, and it can be overwhelming as a first time mom. So, I'm about to give you more!!!
First piece of advice is to follow my heart and your baby's lead. She'll let you know when she needs to eat. I guess we did the on-demand feeding with our two children. They were like clock-work at times, but other days were crazy. Each day is different, and the baby is ever changing. They're human too, each day is not the same for them.
We believed strongly in "don't wake a sleeping baby". Put your fears at ease, I fretted with my first baby too, until my mom set me straight! Love experienced moms! The hospital had me so scared about feeding every 4 hours, and you HAVE TO WAKE THE BABY if they're sleeping. I was so upset, I didn't even want to bring my daughter home! Again, the on-demand feeding comes into play here. Let them sleep and when their tummy rumbles, they'll let you know! The night feeding may start to get more spaced out too. Babies ususally start sleeping through the night around 8 weeks, which is soooo nice! Both my babies slept 12 hour nights once they gave up that 1 night feeding too. It was awesome!
So, I hope I was helpful. Again, take from this what makes sense to you. Follow your mommy instincts, and you'll be fine.
L. S.