Welcome toTFP! Good to have you here.
Do you want to get it done fast and permanent?
Start by reading this, and don't doubt me here, order this test kit right away. I have no financial interest in the company and I'm a volunteer here. I've read 100+ threads just like yours and advised on around 25ish.
Go online and order this now, including the XL option. The speed stirrer is also nice if you can swing it and I think at $100 you get free shipping.
TFTestkits.net
Read this (just the first post):
TFPC for Beginners
You will pay off that kit in avoided pool $tore chemicals before you close the pool for winter.
You'll then read pool school and learn how to SLAM. That can be started when you get your test kit. It's a sustained shock using plain liquid bleach or pool chlorinating liquid for around 5 to 10 days. It works, and if you just follow the procedures here you'll very likely never do it again.
Your water will be better than you've ever seen (unless you've used TFPC before). That is, safe and sparkly for less money than you thought possible.