This is what I remember from my separation and later divorce in Quebec and Ontario. This was a many years ago… when men were real men, and women were real women and goats were real goats

Your lawyer will give you better information
Separation is the biggest step. You do the financial separation and whatever your STBXH does, you’re not responsible for.
You can live in the same house, I did that, but the CRA came back to me and told I was still married, can’t file as single. You also get to see your STBXH date other people so you truly have to be done in your mind. In my case I didn’t care but YMMV.
The divorce 1year later is just rubber stamping.
From what I read from your other posts, you are miserable with this man. My advice is to try to
detach from him as much as possible. Don’t sleep in the same room. Don’t eat with him cook for him, don’t do anything for him. You really need to detach for your peace of mind. You are divorcing him. He can date 20 other girls or boys, he can play video games all day or whatever. He is your X,and you are moving on to a better life. The opposite of love is not gate but indifference…
good luck!