yea bro what size width etc you talking about? ive been making and selling them. just dont forget to the channel, and keep your rails pretty sharp. otherwise turning will be a hassel. and for a first timer i would build the board a little wider like dont taper down as much from the widest point because it will make catching waves a lot easier with the thing.
When making it with pine you really want to use a linseed oil. I know guys that use linseed oil and beeswax to seal their boards. The problem with urethane and some other sealers it that they can add too much weight to the board making it have less float and harder to ride. But if you have already started to seal it and have around 2 coats done i would say that would be enough.