Okay A thousand thanksYeah, the Wiki's been broken for quite some time now.
Transforming yourself into pretty much anything you want is trivial. Get 2 biojuice cannisters by defeating slimes. Drink one. You are now a slime which grants you the ability to transform into a slime variant of anything you'd like. Enchant the second cannister and it will make you flesh again, keeping any transformations you applied to yourself.
As far as side quests go, I feel like you'll find most of them naturally by playing the game. Any shopkeeper with a side quest associated with them will have a unique dialog option the moment you interact with them, for example. Anyone you meet following the main quest, come back to them after that arc is completed and you'll typically have a romance path or something similar.