Help Me!!!

Welcome! :wave:

Pool School - Guide for Seasonal/Temporary Pools should tell you what you need to know.

Some stabilizer aka Cyanuric acid aka CYA, some bleach, and a small test kit will get you started. The test kit will tell you if your pH needs to come up or down, and that will determine what else you need to add.

Other worthwhile pool school articles are
Pool School - ABCs of Pool Water Chemistry
Pool School - Recommended Pool Chemicals What does what and how to add it
Pool School - PoolMath How to use poolmath top figure out how much to add.