Welcome to the family! Your boat is identical to my 82 19-6..Everyone on here will help you get it to where you want it...As far as fiberglass experience goes, I had none before I got my Aquasport...But with the help offered around here you should have no problems getting it done..Fiberglass isn't that hard, it's very messy though.As like yours my floor was toast, I cut it all out and am now rebuilding it back, already have the stringers done and am in the middle of doing the fuel tank box and my new underfloor storage that will be under my leaning post. Go ahead and figure to replace all foam...it's usually wet. And as everyone on here will tell you, if you do the work you will know exactly how it was done and will know more about your boat than most, which always helps when the time comes to chase a problem...When you start demo, post up pics so we can all see....