1. Decide what you will offer
Most pool businesses are built on recurring maintenance: a weekly or biweekly visit that keeps the water clean and balanced. That recurring revenue is what makes the business predictable, so it is the right thing to anchor on first.
Repairs and equipment work (pumps, filters, heaters, salt cells) pay well per job but take more skill and often a different license. Plenty of operators start with maintenance only, build a route, and add repair work once they know the equipment. You do not have to offer everything on day one. Pick the lane you can do well and grow from there.