Bad mother?

I am debating something, and the answer is not clear. I love my job. I am proud of what I have accomplished and where I have come so far. And, I miss it.
I also love my daughter. She is an absolute miracle and gift, and I cherish the time we are spending together. I am fascinated by her development in such a short amount of time. There is, unfortunately, a but....
I feel isolated, and let's be honest, a bit bored. When I have something to do during the day, like an appointment, a friend coming over, getting groceries, etc., it can take up the whole day. But, when I don't I end up spending a lot of time in front of the TV. Jorja still sleeps a lot, and when she does, in my arms, I watch TV (I can't sleep during the day). We try to go for a walk during the day, or sometimes I work out when she is sleeping, but it doesn't seem like enough. I look forward to when her dad comes home so I can have someone to talk to, but then, I don't have anything to talk about, other than what she has done during the day. I could go out, but then I would just end up spending money. Which, at this point, is not a good thing, when last month neither of us made any money (both being on leave).
So, I have been thinking about going back to work one day a week. This would give me a chance to have some adult conversation and keep up my skills. In addition, it would probably make me appreciate the time I have with Jorja that much more.
Does this make me a bad mother? Should I not want to go back to work? I just don't know how stay at home moms do it. Maybe they are better people than I am. Maybe they are more imaginative and creative on how they spend their time. Maybe they know better ways of stimulating their newborns than I do. I thought a half day to one day a week might just be enough to whet my appetite, but I just don't know. Can I have it all?