hi!
sorry to hear you're having some issues with devising..
im taking eduqas drama gcse atm and our C1 brecht piece is due in december.
since devising is such a large part of your A level coursework weighting its really important that you work with a group that you work well with since you'll find yourself spending a lot of your free time with them working on your piece. personally our group dynamic is decent, theres one guy that doesnt put in much effort and theres another girl who thinks shes a drama goddess or smth and tells us what to do all the time.
its gonna sound a bit harsh but you have two options, either talk to your partner and express your concerns about how you dont feel too confident and perhaps you could rethink your scene to put less weight on you or organise to move to another group. but since you already split off i think it mught be a bit difficult.
the main issue is, is that youre in a pair which makes it harder to split up roles and if you have a disagreement on something its harder to work things out since its 1 on 1.
i think the best thing to do is to get your teacher to work with you at break time. getting through gcse and a level drama alone unless youre a literal god at drama is going to be the defenition of a pain in the ass. drama being such a coursework heavy subject essentially means it has to be scoring high marks if you want a high grade.
in terms of advice, the best thing is to stay organised. have a script and chronologically plan out your scenes, write down whos doing what, what lighting you need etc. look at the scenes you have now and make sure that the workload is equal, since youre working in a pair its very easy to give one person 90% of the spotlight and the other person 10. if one person is doing more than the other youre practically giving them all the marks.
hopefully something here helps you, gl with your devising xxx