At least one other possible solution. Guessed that the bottom was mostly symmetrical - there's one square that breaks pattern though. Thank you for the puzzle.
Well easy start but the bottom well its that one square I will say I got it after 2 attempts I will just say a upside down T middle bottom row. I do agree if you can't do it there's that many move on.
the downward arches, from the logical part, continue radiating out.