I have a new 5'6" hellfire on the way and its not coming with any fins... any recommendations?

I'm a little over 6'.. around 180lbs. It's going to be my first surfboard. I've snowboarded all my life, ridden twin tips and all my friends are switching to surfboards so I figure this is a good way to start.

Mainly 15-25mph winds (up to 40 here sometimes when its nuking).. definitely gets kinda choppy. Will be ridden in small waves to a few feet over head.

Any recommendations would be greatly appreciated!