Sorry to hear that. I'm not a lawyer so I only get feedback from various friends. Best to ask a lawyer friend or call those lawyer agencies for enquiry (some dont't need to pay when you making basic enquiries & deciding which lawyer or family services centre).
Separation is 3 yrs unless filed for irreconcilable differences, unreasonable behavior (like abuse etc), infidelity (with proof & admission). If have to stay in same location during this time, there is a term used for the separation - forgot the term - but it can be done.
Technically (i think) his assets under his name is considered matrimonial assets so can fight for half, alimony & maintenance but best negotiated coz costly if it is fought out by lawyers.