Sleep training courses ....

Hi mommas. So, to give a brief background story. . . I have a 3 bedroom house, each room is full, and so we made the decision to put my babys crib in our master bedroom. But because of this, my baby hardly uses her crib, and we mostly co sleep. I really would like to get her to use her crib more often, and have considered buying classes like taking cara baby for sleep training. I just don't know if it is adjustable to my situation since baby doesn't have her own room. The trouble I run into is my husband works late most nights and gets home after I've put the baby to bed in her crib. Our bathroom isn't separated by a door, just a short hallway, so he has to come in and change /shower/ get ready for bed and it wakes the baby up, but if I tuck her in next to me she'll typically sleep through the noise. And then again if either of us have to use the bathroom in the middle of the night same situation. I just don't know if it's even worth it to sleep train, and unfortunately I'm not in a position to where I can move her out of my room. Any thoughts? Im open to different opinions and ideas!