I became a single parent when my DT's were 4 month old. I left the family home at the same time so effectively made myself homeless.
Best thing I ever did. 
Not going to lie. It was hard. But the boost to my self-respect and the sudden ease with which I found problems could be overcome when you alone are the master of your own future was well worth it.
In practical terms, the main thing is get yourself good childcare. You cannot be chief parent, chief earner, and chief child-carer. You can be the former two, but not the latter as well. Delegate. It does not take away from you as a parent. You simply learn to make the time you have together count more.
Secondly, child-proof your home. You need to have a safe place to leave DC when you shower, need to make a quiet phone call, etc. I used an old-fashioned wooden play pen.
Bedtimes - try a number of ways and see what works. What I found with mine was that a bedtime story and long cuddle together in my bed worked well. Then I put them to bed in their own beds separately and spent 5 mins with each of them, alternating who went first each night.
Contact - depends on how your X takes. If he's not someone you want to be with but is a good dad and a decent person, no reason why contact can't be at your place until breast feeding is no longer an issue. However, if he's a freeloader, contact will be best away from your house. You can get round that by either having regular but short contact sessions to not interfere with BF, or you can express so he can take it away with him.
The main thing with single parenting is the loneliness and the overwhelming sense of responsibility. I like being alone, so loneliness didn't bother me, but I also have a superb network of friends, and I'd recommend that to everyone no matter what their circumstances. No one is an island. We all need people we can talk to and offload to, who we can lean on when times are hard. Regarding the sense of responsibility - embrace it. Yes, it's a big responsibility. But by the same token it's a huge privilege, liberating (not having to compromise your parenting ideals), and very boosting to your self-esteem (I did it on my own!) and the rewards of knowing that wonderful child is a product of your parenting is immense. 
If this is the right thing for you, it will be a good thing. Contrary to popular belief, single parenting is not shit; it can be great.