Thoughts from someone who hates sewing!
Learn to use the machine well.
Learn about measuring and fitting - maybe a tailoring focus would be better than a more general class since fit is more important.
If you don't already have views on the subject, learn about the properties of materials, and how that affects the properties of FF suits. Even consider apprenticing yourself to someone who makes suits.
If you're naturally good at this sort of thing you might be able to produce something reasonable quite quickly. Personally, I'd be thinking of suit production as a business opportunity before putting in the time and money I'd need to learn to sew well enopugh, but that's me. Good luck with the project!