2 Separate ASTs??

Hi all, looking for some help again. I am looking to rent my house to two separate people. Would prefer to do this as 2 separate tenancies. I am assuming a standard AST form would not be suitable for this? Would I need to get a solicitor to draft one or is it possible to do so myself? Does anyone have any advice on wording etc pertaining to shared and exclusive rooms? I'm reasonably good with contracts etc so think I'd be able to do something myself with some assistance.

Thanks again

Anna