Electric Motor for new Outcast Pontoon

Hi,
I have been fly fishing, in the west, for several years. We travel
full-time in an RV so we can visit almost any fishing venue. (If it
wasn¡¦t for the lack of a national fishing license ƒº)
I decided a pontoon boat would be good to explore small lakes and
rivers. I have ordered an Outcast 900FS, a one man, 9 foot pontoon
with a 400 lb capacity. It has a motor mount in the center of the boat
behind the seat.
Question: I would like to get an electric motor for the pontoon but I
don¡¦t know what motor to buy. I need some advice from folks with
experience with these motors on pontoons. Brand, model, thrust
required without over powering the boat. Since the motor will be
mounted in the center, how will I control the speed/direction? Thanks
much for your advice/opinions.
Sincerely, Jerry Thomas