One account, renter and host
One account does both things. The same person can rent a space and list a space, and there is no separate host account to open.
To publish a listing, you simply start one from the account you already have. In the app that is a button in your profile, and on the website it is the area for your listings.
You do not switch between modes. The same message list, the same bell and the same profile serve both sides. A notification about your listing and a notification about your rental arrive in the same place.
A new listing is reviewed before it appears. If it is rejected, you receive the reason in writing.