Roundabout! - Minecraft Gameplay from a Newbie

I finally manage to ascend to the top and get myself to the next test. Unfortunately, the next test involves a lot of lava and some logical thought, the latter of which I am, sadly, lacking! Much death and stupidity involved here so brace yourselves!
Please feel free to comment tips and tricks below to take me from total noob to...slightly more competent!
Map is available at:
www.minecraftm...
PLEASE NOTE: Map runs on Minecraft version 1.19.4