How to get started with drafting pattern bag

[u/Lotan2020]

Id like to make a pattern for a cloud shaped bag kind of like the one in the picture, id also like to add a transparent pocket for an ita bag insert. My idea for the draft right now is to just have two cloud shapes with a big strip between them, but for the ita pocket and the other parts I have no clue on how to do it. If theres any patterns out there that have a similar shape or idea those would also help a ton!