If you have the funds to invest in tiles, this is an excellent option. Both labor and material will be expensive.
I wouldn’t apply fiberglass coatings to my body as I don’t like to inhale it. Methyl Ethyl Ketone or MEK is the catalyst for isophthalic resins - there's no Bueno! An epoxy will work fine. When applying coatings in an unventilated area, be careful of gaseous fumes.
Concrete shells with a Portland cement-based coating, also known as "plaster", are the most popular in-ground pools. This seals and protects your shell. The plaster can be coated with epoxy, paint or fiberglass. Plaster can also be used as a substrate to tile.