It's hard to answer in great detail without knowing the reasons for the breakup and whether you've both made the decision to move on, or whether the desire (on the part of at least one person) to spend "family time" is based on wanting to get back together.
You worry that she will sense that things have changed? Of course they have changed! You have split up! Are you thinking you can hide that fact? But she's 10 months old - whatever happens over the next few years will be what she sees as "normal" and not what happened over the past few months. You can't hide the separation from her - it's the reality. So it's best if she spends time with each parent separately in both homes, with "Mommy time" and "Daddy time."
If you parents are both on the same page in terms of goals, discipline, values and more, great. It's nice if you can be in the same room for birthday parties, doctor appointments, preschool orientation, teacher conferences, recitals/concerts, and so on. If you can do the "exchanges" with cordiality and no drama, excellent. If you have an occasional dinner, and it works, that's great. But if your plan is to get together all the time to "coparent" and keep her from thinking that Daddy was just at work vs. living in his own place, that's a disaster in the making.
Coparenting doesn't mean being together all the time. It means agreeing on what your goals are for her, standing together for discipline, agreeing on religious upbringing and checking in on great moments and problems.
If you and he are not on the same page with all of this, get some family counseling so you can make the breakup much smoother in terms of your child. But coparenting fails when one person thinks it means something different from what the other one thinks.