Feeling regret about a job I have taken in an RI school

[JuliaHulia]

A few weeks ago I interviewed for and was offered a job in a school near to where I am moving back to from abroad. The school is an RI school but I know someone on the management there and they are lovely. I enjoyed the interview process and felt positive about the job when I was offered it . Over time, I have started to worry a lot about this job - I don't know what it is like to work in an RI school. My last jobs have been in independent schools - one overseas and one in the UK, and prior to this I did several years in a state school but it was 'Outstanding'. I am a good and experienced teacher and I enjoy my subject (non core) but I am now very worried about what I've let myself in for. I have already signed a contract - is it too late for me to pull out of this? I just feel so anxious about potentially letting myself in for a miserable ride.
I feel like perhaps I should just stick with the private sector as it's what I know, but it is it too late?
I know this is a bit garbled for some reason I've got myself in a bit of a pickle about this and think I'm going to hate the job.

I moved from a school in SM to another school in SM and they couldn't have been more different.
School A was obsessed with the fact that they'd been hard done by (they hadn't) and nothing was going to change.
School B was determined to get out. It was bloody hard work but we did it and when we came out, our next grade was outstanding.
It won't be easy - we had to plan every lesson formally and there was a lot of checking up - but if there is a sense of being in it together, it can be a positive experience. I'm still at school B and, in some ways, SM was better because we were a team.

If you’ve signed a contract they could insist you pay re advertising fees and even cover until the post is filled. I doubt they’d let you walk away with no consequences, after all they haven’t broken the contract.

I'm not actually going to walk away. I'm just having a wobble!

@JuliaHulia

I'm not actually going to walk away. I'm just having a wobble!

You did say ‘is it too late to pull out of this?’ - yes, it probably is

I worked for a number of years in an 'outstanding' school - hadn't been inspected in an age and there was a lot of laziness, complacency and unwillingness to change. I am now in an RI school which is much more forward-thinking, dynamic and exciting, with far more opportunities for CPD and career progression. Ofsted grades aren't an indicator of what the school will be like.

Thank you roaringwater that is great to hear. I dont actually intend to pull and in many ways I am looking forward to it. The schools has great facilities (which is important for my subject) and I got really good vibes from the interviewing team and the head. I guess because I have been at this teaching lark for a while I'm used to quite brief planning, I rarely write out long lesson plans. I am a bit worried I'm going to have to write a long one for each lesson ...

I was also drawn to what is likely to be good career progression is the school is massively expanding with a change of catchment area.