How and when do I tell him?

I want to seperate from my partner.

We have kids. We live together.

We're both working.

I don't know how to tell him I want to seperate. obviously to make things easier on the kids, it's best that we keep things as positive as possible.

I don't know where to go if he'll just tell me to get out.

I don't know when I want to seperate. I have a temporary work contract that finishes the end of june.I'm pretty confident that I'll still have a job, but I don't know the conditions of my new contract yet. Even if I don't still have a job I am a good candidate for a job, I'm not worried about work. I'm only worried about how it looks for a home owner who I' ll be renting from.

I want to leave our home and rent something different. He'll want to leave but I don't think that would be realistic.

He has 4 kids, I only have 1. (there are 4 kids, 3 are his with his ex, 1 is both of ours. The 3 are teens and also due to their personalities and issues they really do need the privacy of they own private space)

we pay a pretty low rent for decent quality house and 4 bedrooms.

(for reference we pay 800€/month, standard housing with 4 bedrooms for rent is average at €1100, standard decent appartements and houses I've seen with 1 or 2 bedrooms are between €700 and €800)

I want to do it in a school holiday. If he shows me the door that I can possibly stay at my dad's and then I wouldn't have to drive an hour to get my kid to school.But he's been pushing to know my off days for the school holiday. Ideally if we seperate, it would be best that we have opposite schedules.

I definitely do not want to leave my child.

@Penelope & Christina

He's actually tracking my every move via location tracking and I can't go check out potential places. I also want to be sure that I won't be held accountable to pay for stuff at his house while I'm living seperately.

So I need to be dropped off the contract, something he'll need to sign for as well, so these are very practical things I can't arrange before notifying him. and things I need done before I can arrange a new living situation.