Sounds like you have a pretty good understanding of what you need to do. Just a couple of comments.

Keep an eye on your pH if it is just a tad over 7. You don't want it to drop any lower. As a matter of fact, I'd go ahead and add a little Borax.

Those tabs are trichlor and not dichlor. They will add CYA and you need some but it takes time so you may find that until the CYA builds up some, you'll have trouble keeping chlorine in the pool. You may want to use dichlor instead of the trichlor tabs. It is a granular form of chlorine which means it is quick dissolving and thus will build up your CYA level a little faster. Then, once your CYA is where you want it (most pools do well at about 50), you'll want to switch to just using liquid chlorine or bleach so your CYA doesn't get too high. If you do use dichlor, you have to be careful. A lot of places sell blended dichlor which has unwanted stuff in it. If you have a Sam's Club near you, you can buy their PoolBrand dichlor which is fine.

Now, a question. What was your CYA reading when you closed last fall? Some pools lose all their CYA over the winter when it biodegrades, leaving a huge chlorine demand. I hope this doesn't turn out to be the case in your pool. Let us know if you are losing chlorine really fast. Especially telling is if you are losing more than 1ppm of chlorine overnight.

Welcome back for another season on the Pool Forum!