Not sure if this is a DA or DFP question...

I've attached a zipped page which on the live site needs to do two things - pull some data from one table, and write some data to two others. The 3 drop down menus are to be dynamically populated from one table (practicelist) while the comments field is to be written to another table (reviews) at the same time as the reviewer's name, pet's name, contact name, address, phone and email fields need to be written to the third table (reviewers). The idea being that on another page, the review information will be dynamically added to the results page for each practice.
So far I've set up a recordset for each of the three tables, but have no idea how to move on from this. Each time I've added a recordset, it attaches another link to the connection script, so I've removed two of these.
I'm assuming that I can achieve what I've outlined above using DA, but would appreciate some very detailed guidance (in real newbie terms) explaining how to do this, please.