Last year I was where you are. I could barely see the bottom and kept shocking. Then I found this site and YEA! So you're at the right place for good, no, most excellent recommendations/advice.
This year after opening I had clear water but was going through 4-5 182oz bottles a day with 0 FC by the next day. Finally I got time to shock per the instructions others have referenced. Now I use 1 jug a day with FC dropping from 9 to 6. I have full sun all day so I'm going to increase my CYA from 35-40 to around 50 to see how that does. One thing I did, which you might want to consider is not increase your CYA until you are through shocking. Check out the Pool Calculator and you'll notice that the shock level for higher CYA goes way up. I had to shock at 21 last year due to high CYA. I had plastic jugs everywhere. Once you get through shocking then you can get your CYA up to the recommended level if you are not already there. As the others said...Wait till you get your Test Kit, then you'll be ready to go to battle and win the war.
Good luck