All kids are different, but generally if you start things a certain way kids can adapt.
Having said that although I full support you in wanting to support your family, breakfast and after school club every day is a lot of time.
If, in the future, you are not happy (and you can afford to do it) you can go part-time or at least some form of part time.
My dd went to nursery starting in the mornings quite early but only a couple of days.
Your dd may well like it a lot. You may well find it fine. Or you may wish you had at least one day when you could collect her and do stuff after school together.
My boss allows me to work a few hours at home by remote access, it makes life easier. It is not open to all in all jobs but in my place it is very common and actually eases the congestion in the cafe/car park etc!
I don't think you should feel guilty as you are supporting your family, which is great.
You may wish to negotiate your hours at some point when you have your feet 'under the table' at work, so to speak.
It is also my experience that one has more power to negotiate how your hours are worked/when/where etc the higher up you are in a job, so your ambition will be a good thing in the future for getting things how you want.
If you want the way things are great, but if in future you want them to be different, do not feel bad for making changes either.
Enjoy your new job.