That's like an 800 dollar board and you want to try to do your first repair DIY with instructions from the internet for something pretty involved including adjusting the angle of the fin (that box won't fit back into the socket hand in glove...there is some play there and if you get the angle wrong then the board is going to be like an old car and pulling to one side)....you have fiberglass but will probably have to take the area down, lay on the glass, then the resin (am I right here? I've never done it because I have a "guy" and delicate hand done repairs so that the bottom contours, overall board weight and sanding down/finishing so that you can hardly tell there was an issue is WAY over my head).
Should I continue?

That's what I meant about the solarrez....it isn't a simple ding repair...it's pretty involved and you have a nice board....I'd get it done professionally.