I agree the plant is heavy and the stem is long. I would use cactus mix and not so much peat moss. You could cut the stem, callus it off and replant the top so it would stand up straighter. If you are afraid of losing it. Plant a leaf cutting first for back up. Cut the leaf off and callus it off . Plant in a shallow pot in cactus mix or 50/50 peatlite. I prefer terra cotta pots and cement pots for succulents they breathe and the heavier pots don't tip as easily.
Happy gardening in Hawaii. Gardens are where people grow.