G.B.
It seems to me you are doing things very well.
1. Your baby is going through their "Trust vs Mistrust" stage right now and you need to be sure you are meeting her needs so she doesn't develop mistrust in you. You are doing a good job, just make sure you do what you feel is right. Learning to self soothe is an important step in a childs development. But if she's not ready then you need to cut that time down to only a few minutes before going back in to comfort her.
http://en.wikipedia.org/wiki/Erikson's_stages_of_psyc...
2. Good for you, breastmilk/formula is complete, take your time. Baby food is gross and doesn't contain very many nutrients. One thing good about stage 1 baby food is that it allows your baby to try a single food at a time to see if they have any allergies. Only add one a week, or at least wait a few days before adding another one.