First on the list has to be the blog by Becky Wood that started off the whole What How Why movement. If you are still trying to PEE and wondering what all the fuss is about, this is where to start.
Susan Strachan has written some excellent blogs on teaching analytical writing. Start with this one and work your way around her website.
Tom Needham’s blog is also one to dive into and work your way around but I would start with his blog on writing introductions.
I also love this blog from Anthony Cockerill on what the important elements of analytical writing actually are
There are all sorts of brilliant books on writing analytically. Start with
I would also recommend Neil Bowen’s book The Art of Writing English Literature Essays for A Level and Beyond