Welcome to the forum! You have been given some good advice so far. I'm just gonna tweak it a little and throw in my opinion.

Don't buy any muriatic acid yet. You may find that you don't need it and you can always get it later if you do. I have had my pool for 10 years and have never once needed to add any.

I wouldn't buy the 12 lb. bag of baking soda. Although he is right that it is probably a much better price per pound, you most likely won't need anywhere near that much. I know I have not used that much total in all the years I have had my pool. Maybe just pick up a 2 or 3 small boxes to have on hand. If you find that you need it, you can always get a big bag later.

Do buy the Borax though. It is good to have on hand and you will more than likely need it once in awhile.

I want to caution you to go slow especially with adding the cya (stabilizer) to the pool. You want to gradually get to your desired level (I like around 40ppm) instead of adding a huge dose and then overshooting your target. The only way to get rid of it, is to do a partial drain. Aim for an initial level of about 25-30 and then tweak it from there.

Glad you found us. Let us know when you get set up and do your first water testing. Post your numbers and we'll point you in the right direction!

BTW -- If you are planning to read every word you can find on this website, you better get started and I hope you don't need any sleep! This forum is a BIG place!