The fact you still have CYA remaining is great. Bump that FC up to at least 5 for now and consider doing an OCLT to be sure nothing is growing. If you fail the OCLT, do a SLAM right away before increasing your CYA to the 70-80 range. Here's the TFP page for Pool School - Opening Your Winterized Above Ground Pool.
I'd get things balanced and squared away as a bleach pool, then add the salt and fire up the SWG. To that end, add bleach, mess with the CYA granules and the sock, then dump in the baking soda. Wait a few days until the CYA is all dissolved and fine tune, then add the salt.
With your vinyl pool, you don't really need CH. You might get some foaming where the return stream breaks the surface, so if it bugs you, raise CH. If it doesn't, save your money.
Your call BigRed. If you find after opening and adjusting that FC holds well after increasing, cc continues to be next to nothing, and water remains clear, press-on. Later, you can always run an OCLT if in doubt.