I use the following sites to help me keep track of the canon comics/books coming out and where they are take place in the Star Wars timeline.
This site lists the timeline of the Marvel comics: https://comicbookreadingorders.com/other/star-wars-marvel-reading-order/
This one has the books: http://www.yodasdatapad.com/booklist.html
This one has a little more detail on the books and allows you to filter by the types of books: https://starwars.fandom.com/wiki/Timeline_of_canon_books
I'm still working my way through the comics and books, but don't have any that I think are "essential". I think they all add to the Star Wars universe in their own way.
Enjoy!