RE: Where to start?
Are you looking for something turn key that you can take out of the box and fly or are you looking at something requiring more work like an ARF or a kit?
There are a number of ready to fly trainers on the market. The Hobbico Nexstar is a good one and their are others. I believe that there is a list somewhere in this forum.
Regardless of what you select, I'd stick with soemthing high-wing that is intended for new pilots. As for engines, go with a decent .46 so that you can use it in future planes. Same goes for the radio; get a good 4-channel unit at minimum. If you can swing a computer radio, go for it. It may not be necessary for your trainer but you'll want one in the future so you might as well get it now.