I want to do anal

I have anal toys, i havent used them since i was 4 months pregnant, but i wasnt always using them... anyways, tomorrow i wanna do anal, how long will it take me to losen up so my boyfriend can put his dick in and fuck me ?Like for it to be comfortable. We have done anal but never enough for my ass to be like open and used to it. But i do wanna have anal and get used to it especially wearing butt plugs

How many minutes do i have to play with my anal toys in order to have anal sex comfortably?