Doing basically nothing except what you perceive as the 'fun' part (and you're likely in for a shock there) and watching the £££££ rain down isn't how self employment works, sadly.
Nothing in your post refers to any 'agency set up', though - from the above it just sounds as if you want your partner to build you a website, and there's nothing illegal about that? It does also sound as if he wants to be involved to a degree most of us (and certainly most punters if he's going to be answering your phone and therefore having access to their contact details - it will be extremely offputting to some, and probably the majority) would consider inappropriate. This includes the fact that he's registered your account for you here and is apparently writing your posts for you, too.
Pimping would mean he was both controlling prostitution (including taking bookings and then telling you about them) and being paid a cut or gaining in some other way from each booking. If you just want to 'have sex and get paid for it' without taking any responsibility for your business, why not try parlour/brothel work, since independent sex work means far more work that a venue (with invaluable experience and industry knowledge that you don't have) will do for you? Why do you think it's OK for a partner to have the means to control somebody's livelihood when they can't contribute anything you can't easily do yourself - ask yourself why he thinks he has any right to be involved in your prostitution beyond knocking a website together if you don't want to organise one? Doesn't he have to work too?
In the event that this is a genuine query, you need to register your own account - SAAFE is sex worker only. We suggest you use an email your partner doesn't know about or have access to. We're sex worker support, not Pimping 101.