How should be my 6 weeks old's feeding habits be like?

This is normal. She is probably going through a growth spurt and needs to nurse freqently. To encourage her to get more milk, mage your when your milk flow slows down toward the end of the feed while she is still latched so more milk flows and she gets more. My lactation consultant told me to act like I'm trying to get him "drunk on my milk". Keep feeding him until he refuses it and then he should go longer between each feed. Just stick it out because feeding gets easier! Your milk is perfect for her. Try going to feeding support group to get more info.