HI J.-
I agree with the other moms as far as the sleeping issue. I will say that I had my daughter sleep in her pack and play at night right next to my side of the bed because I was breastfeeding. We decided to move her to her own bed around 6-7 weeks and I just had to get up and go feed her in her room. That is definitely a personal choice and every baby is different. Some sleep through the night fairly quickly and some don't. I would only say that you shouldn't try to rush into a routine with a baby.
As far as the weight loss, you said that you lost 30 already, so how much did you gain during your pregnancy and how tall are you? Make sure that your goal is a healthy one. When it comes to the abs, once your doctor has given you the Aok for exercising, go ahead. Something to remember when performing ab work especially after having a baby, make sure to breath out as you are contracting the muscle. So if you are lying on your back knees bent and hands behind your head, gently lift your shoulder and upper back off the floor while breathing out of your stomach. You should be able to see your abs go in somewhat. Pay attention to how your muscles feel during the contraction also. With ab work, it is always quality over quantity also. Try to do 10 to 12 crunches with good form and see how you feel. Once you start an exercise routine after having a baby, make sure to pay attention to what your body is telling you. Just cause the doc says its ok to start exercising, it doesn't mean that you should go full out. Be very aware of how you feel while exercise and after. I think that starting with some cardio would be good. Weight lifting is great too, but you want to get your body back into exercise mode. I don't know if you are breastfeeding, but if you are I would not recommend too much of a restricted diet. Otherwise, eat 5-6 smaller meals per day with a good balance of protein, carbs and fats. It helps to speed your metabolism and eventually lose some weight. Keep up the good work.