You will be a fiberglass
expert by the time you are done with that project
......there are some good Youtube videos about fiberglass repairs
blisters, worth watching some. Generally you will want to grind down to the level of any delaminations or pockets that ooze liquid, and feather out the area to good glass. Rinse well and allow to get fully dry, then glass with patches starting with small pieces inside the bevelled area, moving to larger ones until you are flush with the original hull
. Grind and fair, repeat as needed. Good luck.