1. in the forest (green door, you need the emerald fragment)
2 and 3.see the guide
Viewing post in I have several questions on several quests
You can find the Guide (Guided Walkthough) in the Help Thread here on Itch (one with the "sticky") or go to the Patreon Page and find the Guided Walkthrough (which I have been doing) and Picture Walkthrough (though this one has not been updated since 1.0, but recommended if you want pictures and not text). All 3 Questions are answered there.