Looking for advice on grammar/state sixth forms in Essex (planning to transfer)

Hi everyone!!
I’m currently in Year 12 studying at a county high , but I feel the academic atmosphere here isn’t the best fit for me( especially no one participated in lesson made me feel so confused).
I moved to the UK just last year, and had to complete my GCSEs within one year, so it was quite rushed.(and I only got like 49points in total, didn’t really get to the enquiry mark for those sch I’ve been searching for)
(4 for science,3 for art,6 for eng lit& lan, geography,7 for math, 8 for history,9 for modern language)

Now I’m planning to transfer to a better grammar(if I could) or state sixth form around the Essex / Elizabeth line area (roughly between Stratford and Shenfield), ideally after Christmas if possible.

Thanks a lot — any advice or personal experience would be super helpful! 😭