Fin package advice

as a new shaper (3) under my bealt, i have begun to start to branch out from the thruster and standard thruster fin package. attached below is my latest shape and was wodnering fi anyone could give me some ideas for some fin set up. i wanna keep the retro feel as it would likely be used in 2-3ft weak surf. im thinkin twin fin and a single concave bottom and 6 degree cant twin fin.

please help me complete my design with a fin package that will carry drive on my 210lb frame through some weak sections and still allow me to lay down some smooth turns. thanks,