What happens in divorce?

My husband is showing signs of hiding his phone, looking at other women online but trying to do it incognito (probably doesn't know you can still see search history on another device) and he has said some quite unkind things to me. He has lost compassion and even when I ask him about his day he "feels under pressure" and gets annoyed at me. I get a sense he is wanting out. He text his old work colleague, a beautiful woman, how her child is during the divorce... is he still close with his dad etc. What do I do for divorce? Like, where do I go and who do I ask and how do I prepare? I'm still on maternity leave and I cannot drive, and there are little to no jobs around and no driving instructors available. I feel if he goes now I'm a little bit screwed and will have to be homeless with baby. Or maybe he is waiting for me to be back in full time work? Either way, I don't feel good in this relationship and I'm probably making it worst by my anxiety being unable to smile etc around him... all the more reasons to leave me, right? Intimacy doesn't exist because romance isn't happening, and he stopped helping or being present. Just him and his phone and his videogames. It is definitely a driving factor for him to leave me, and I don't blame him, but I'm a bit worried about our future (mine and babies). He will be fine, hunky dory, just crash at another woman's house. He already told me if I die he will find another woman. He told me other women are more beautiful than me and makes it obvious by staring and ignoring me in public, he mocks my little boobs after feeding our baby for a year, he doesn't hug or hold me. And I probably turned him off more by asking for him to actually hug me back. I never expected to be a single mum, I had hoped my husband loved me... but sex always wins right? That one day you reject it because you're mourning the death of a baby that died inside you ruins everything.... I understand he hurt, but since that day he withdrew from me...