So you might already know some of this from browsing the site, but the two biggest things with CYA are: 1.) the higher your CYA is, the more chlorine it takes to reach sanitization levels in your pool. and 2.) the CYA levels basically never go down and the only way to get them quickly down is to drain / swap / refill your pool. Take a visit over to the Pool School link on the left and browse, if you haven't already. Other questions you can search for or check the Wiki.
You're in a lucky part of the world where it might make sense to leave your pool open year-round. Even if you don't, but especially if you do, you're going to want to get CYA down to our recommended levels so you can keep algae from growing. It's a really good idea to download the paid version of the PoolMath app... I've never done pool stuff before and it's changed my life. Also, there's tons more folks here on the site that know way more than me, so if you'll update your signature with all the nifty gadgets you have and your pool's setup, they'll be able to help you much better than me. Start posting your other test numbers too, and we can help you get a plan for getting the rest of your chemistry in balance when you get CYA under control. It's a good idea to document the chemistry of the water you'll be using to fill the pool as well, because that can have huge effects on your post-refill life. It's also good to know what's been done to your pool regarding metal (copper / silver) algaecides or special shocks or anything like that. Every little bit is eventually important when it comes to getting things back right and not having stains or swimmers with green hair.
Welcome to the family, and good job taking control of the pool. You'll always do a better job yourself than somebody else hired to come in every few days, and this is the right place to learn and ask and plan and share pictures of your awesome pool.