I did Edexcel A level chemistry (UK syllabus) back in 2022 and achieved an A*. I even mentored A level chemistry for a few years during my A levels, gap year and part of my time at university.
In terms of resources, you have relatively little at your disposal that is dedicated to the Edexcel course. A few resources that do have stuff for Edexcel however are as follows:
PMT (Just about everything):
https://www.physicsandmathstutor.com/chemistry-revision/a-level-edexcel/Allery Chemistry (Video tutorials):
https://m.youtube.com/channel/UCPtWS4fCi25YHw5SPGdPz0gDavies A level Chemistry (Video solutions to past papers):
https://m.youtube.com/channel/UCjnvQEEejEGQrPT4JVJgbyQFor the practicals, you have 16 of them to do and submit a write-up for and be familiar with for your paper 3. You can find the practical sheets effortlessly with example questions that might come up in the exam and step-by-step instructions. You need to find the dropdown titled “worksheet” after opening the link below:
https://qualifications.pearson.com/en/qualifications/edexcel-a-levels/chemistry-2015.coursematerials.html#%2FfilterQuery=category:Pearson-UK:Category%2FTeaching-and-learning-materialsIn terms of study advice, do it in shortish bursts with frequent breaks between and use active recall and past papers routinely.
Your brain loses focus after around 30 - 45 minutes of continuous study and so keeping bursts of study between 30 min and 1 hr with 15 minute breaks between is possibly advisable (unless you plan on doing past papers - in which case, do them all in one go under exam conditions).
Active recall methods include things like quizzes, flashcards and drawing mindmaps. These improve your memory, which is very important for learning all the facts, colours, reagents, conditions etc you will need for A level chemistry.
When I used to mentor A level chemistry, my experience was that students often did active recall frequently and so knew all the aforementioned facts etc - they completely flopped when it came to applying that knowledge, however, when it came to answering exam questions. As such, completing and marking past papers is strongly recommended. Keeping a record of which papers you have done, which questions you’ve lost marks on and why is a brilliant way of learning how to avoid repeating your mistakes. You can also make flashcards with the question itself on one side and the mark scheme on the other, if that suits your learning style.
I would also consult the examiner’s reports as Edexcel usually includes model answers (which I’d view and mark myself first) and then commentary underneath with the actual mark and why they awarded it. Furthermore, these tend to be more explicit than the mark schemes when outlining what common misconceptions students had about certain areas of chemistry, which may help you to avoid having them yourself.