Question: Is there a Demo PAMM accounts?
No, as a Strategy Provider you can only trade on live accounts.
To become a PAMM Strategy Manager, after opening a fully verified account with FXTM, you will need to have a successful track record, one month minimum, with either FXTM or another broker.
You can create as many strategy as you wish.
You can find more information in the PAMM Strategy Providers page.