i havent personnally used seneca but i would reccomend doing exam questions you find hard and memorising the answer for the mark scheme from them hope this helps : ))
Me too and, as somebody who tried Seneca, I personally wouldn't recommend it. I'm studying for it now on physicsandmathstutor.com since their notes/flashcards are fantastic. If you're practising questions, I'd look for past paper questions by topic online. Seneca is for quick recall on the day, but there's more efficient ways to get the top grades before tomorrow. Freescienceguy and Cognito videos are good too to break it up.