Salt based or chlorine? What kind of filter?
Salt is much easier to maintain. Which ever it is you'll need some, testing kit and muriatic acid / baking soda. If you maintain the pool properly that should be all you need 95% of the time. You might also need some DE depending on the filter you have.
I'd suggest reading up on free chlorine and how it relates to pools. If you maintain your PH and your free chlorine levels you shouldn't have any issues with it what so ever. Little bit of maintenance and keeping levels correct will save you TONS of headaches down the road. Generally speaking, taking your water to a pool company for testing is a complete waste as they are only interested in selling you chemicals. Most of which contribute to different problems instead of fixing your actual one. Keep the chemicals going into your pool SIMPLE.
I'd also suggest making sure you know how to winterize depending on the area. If you are in a heavy oak tree part of the country let the pollen drop before you open your pool. Otherwise have fun getting it out. Even DE will take weeks to get the fine stuff out of the pool.
Solar / supplemental heat will greatly increase your swim season in most areas.
Make sure you know how to backwash your filter, drain excess water from the pool and have a hose handy to add water if you have a dry spell. Make diagrams of how everything works or you'll regret it next year when you forget everything.
Nice forum and "pool school" top left