Got a similar issue myself, but am more confused as to what direction to take. I believe I'm just before the first boss (where it tells me to get two wyrmstone pieces or something) but when I go to get a certain one I can never get back and get trapped in a loop as the  path to get back is either REALLY hard to do, if not impossible, or is just flat out unclear. Any chance I could get some clarity? (trying to go up in screenshot, timed plant platform seems un reachable as a platform and is in my way otherwise)