Well done for making the decision kitty, that part is so hard & full of feelings of guilt & inadequacy. I hope you feel a bit relieved that its done & he knows :)
First thing is, there is no longer any 'we'. You have to prioritise your dc & he can sort himself out. It can be weird, especially as you've always thought of him & considered his feelings but just bear in mind he may get nasty so you have to put yourselves first.
Why does he want you to wait a while for divorce? Does he think he can make you change your mind? As per point above it is not his decision when you decide to divorce, & you don't have to wait for his permission. Do it when you want to.
Go to see a solicitor (if you can afford it), if not make an appointment withe CAB as you need advice on assets & tax credits. As maparole said I think you can claim singly even if you live together but I'm not 100% sure. Ask the CAB:
- Can you cancel the joint tax credits claim & apply as a single parent
- Are you eligible for Housing Benefit/council tax benefit
- Where you stand if you wish to move out of the rented house but he doesn't. Can you leave without being jointly liable for the rent if he refuses to sign a new contract.
Can I speak from experience here & say that no matter how civil you think he will be, or he promises to be, you need to consider getting the CSA involved in child maintenance (I didn't & have regretted it ever since, as my exH is now unemployed & pays £10 every 2 weeks for my 2 DC). They can also help with access I believe.
Keep in mind that he may be going through a period of denial (hence the divorce wait) & that even the nicest man can get very very nasty when he realises you are serious about leaving. Try to prepare for this emotionally & make sure you don't put his needs above yours. Now you are seperated its not your problem where he lives or what he does. You only have to look after yourself & your child.
It seems daunting but its worth it, being in an unhappy marriage is soul destroying & I've never once regretted leaving mine. Just be strong & you will be OK. 