Hi! I get what you mean, I do Bio OCR and my favourite resources are Save My Exams, Amoeba Sisters, Free Science Lessons (these are quite visual), PMT and flashcards. There is a LOT of content, no matter how many times you hear it, it will still take you by surprise especially for Yr2, so I'd also recommend writing a Word Document throughout the 2 years to write down all the steps for the different processes you could be asked about in a 6 marker e.g. DNA replication, Respiration etc. That and keeping a record of all the chemicals and enzymes that you come across, there are a lot. I've made a Quizlet Flashcard set that gives all of the ones I struggle with and forget. Just try and do this throughout the 2yrs so that by the time May/June in Yr2 comes around, you can do solely exam questions (the MOST important revision). As long as you make revision material as you go along, I'm sure you'll be fine. Good luck!