Any tips/resources to best survive fast track higher English?

Hello! I'm late with this reply, but I'd really recommend getting a copy of the Leckie N5/Higher Snap Revision books for Carol Anne Duffy's poems- filled with great annotations/helpful background info on each poem + poem specific questions and are only £5!
I didn't study Jekyll and Hyde but generally there are really good free summary and analysis videos on youtube, the channel 'Course Hero' has a few on Jekyll and Hyde that might be useful.

As for general advice, make sure all your poetry/essay/close reading answers are weighted towards analysis - analysis is where you will get most of your marks in Higher English.
You might also find the PEEL paragraph structure helpful for crit essays: Point, Evidence (quote), Explanation (analysis), Link back(to the essay question). You can also get some sneaky marks in if you drop an personal opinion about the text in your closing paragraph.
For close reading make sure you know the question types - they can only ask you about so many things. The text you get is always unseen so the best revision is definitely just going through past papers for experience/practise.

Hope any of this helps out!