You definitely need to read up on the SLAM process in Pool School, see link in my sig.
Also read PS (PoolShool), lots, then read some more... when you're tired, walk away, chew on it... then come back and read some more.
See other link in my sig for our recommended test kits and purchase yourself one of those.
The TF100 is the best bang for the buck, yeah, it's a little bit more but it has a much better carrying case, you can fit things like a "speed stir" in it, which you'll really want sooner than later and the reagents are a better value, being more for your money because they're larger bottles.
Once you get your kit and test the water, start SLAMing that bad boy!
The longer it sits, the worse it gets and the more work, time and money it'll take when you do finally start it.
Post here as you go along and we'll help you. But we can't do much without a proper test kit.
EDIT: The pump should run 24/7 while you're SLAMing the pool. Once you get it all cleared up and you finish the SLAM process, then you can settle into a nice rhythm of just running your pump the minimum amount needed to keep your pool properly filtered so it's clean & clear & stays that way with daily testing & occasional maintenance. Once you learn the "rhythm" of your pool, you'll be able to gauge things more easily and have to test less often and simply be down to just adding CL+MA on a regular schedule. Just like a pet.
I highly suggest cleaning your sand filter before you get started. That is.. assuming you have a sand filter. See my sig for instructions on this. It's quite important, otherwise it won't filter at its peak efficiency or in some cases, which isn't rare, filter very poorly, hindering your progress and speed.
I would also look @ the article in PS on adding DE to your sand filter so you understand how that works, so you can be prepared for it by having it on hand. Again, it speeds the filtration process up which is nearly the longest part in many "swamps".
I highly recommend cellulose powder over DE, for many reasons. Home Depot has a GREAT deal on a 3lb bag of the stuff, free shipping to any store. *See link.
how-much-water-should-i-drain-t64974-20.html#p541198
Before you start all this, definitely post test results so we can point you down the right and best path for your pool and your pocketbook.
Cheers!