We’ve seen worse.
Just sand it as best you can and go from there. If you get into the paint - which you probably will, then plan on coming back after and reshooting it.
The part of the board that needs to be smooth is the bottom. The deck can be a little rougher without affecting the ride. For my own personal boards I don’t even sand the deck - I only sand the bottom and rails and take a quick pass over the deck to knock down any nubs. The deck gets covered with wax anyway.
The main thing you want to do for the deck is to not repeat the same mistakes on the laps going on the bottom. Now is not too soon to learn how to tape for a cutlap. Make it easy on yourself and only use a 1" cutlap on the bottom side. Before you lay the tape make sure the lam on the bottom is clean, and then use good quality tape and lay that out so it really sticks. You don’t want any resin seeping under the tape line. Run a couple lines of tape and then cover the rest of the bottom with some butcher paper or the like so as to keep all the resin off of the lam.
When you glass the deck, do it in stages. Lay your cloth down and cut it rough around the edges, 3" or so below the apex of your rail. Mix 1/3 of the quantity you expect to use and lay pour that out over the flats of your deck. Pour it in thin ribbons all up and down the board so you won’t have to move it around a lot to get it to cover. Let is seep for a minute then spread it unti you use it up. Don’t let any of the resin drip onto the raisl, keep it on the flats.
Now go back and fine cut your laps, only long enough to extend 1/4" or 1/2" past your tape line. Try to cut it as cleanly as you can. Because you already tacked the deck down you don’t have to fret the cloth moving around from where you cut it the way you do when you cut your cloth while it’s all dry.
THEN you can mix the next 1/3 of your resin and do the rest of the flats and the laps on one side, and squeegee it over your laps while it’s still fresh. Repeat the same on the other side. By breaking your mix/spread into 2-3 parts you are taking all the drama out of getting your lamination even without any of it setting up before you’re finished. It takes a lot longer to do it this way but the results will be a lot cleaner and more predictable.
Later on after your lamination technique improves you can go back to mixing your resin in one batch and laying it out quickly and efficiently the way the pros do.
After your fill coats, you can sand your rails by hand. That way you’re less likely to burn through. If you really want to take your time you can do the fill coat on the rails first (one at a time, the same way you shape them), then hotcoat the flats. Now you don’t have drip lines and runs on your rails.
Finish this one, surf it and have fun on it for what it is, and start planning on your next board. They don’t have to be perfect to be fun.