Well Bill, let me be the first to welcome you. I'm fairly new to the site as well having just purchased a Taylor 110e.
And, like you, picked up the guitar after a hiatus of some 25 yrs. It sure is fun getting back into the groove with the exception of, as you mentioned, burning fingertips !
KNowing a few chords is a good start. Think of how many great songs we all know with just 3 or 4 chords.
What I've been doing is both strumming and picking which gives my playing a little more depth and interest.
I've been practicing some of Gordn Lightfoot tunes such as, If You Could Read My Mind, Carefree Highway and Rainy Day People. Sometimes I surprise myself when I hit all the right notes and chords !!!
Well, keep at it and make sure you have fun at it.
Russ