I need suggestions for fantasy/mythology fiction books

Hi! I can’t find new books to read, I tried to follow some suggestions from book instagram, but it was a fail for me.
I love fantasy and mythology and everything that falls under these umbrella terms, however I have tried reading books like Forth Wing, but the writing was so similar to 14-year-old-writting-fanfiction that I couldn’t finish it.
For reference a book series that I absolutely love with all my heart is The mists of Avalon.
I am also willing to try some sci-fi or space related books.