Hi there,I would highly recommend learning some simple Kabalevsky. Off the top of my head, opus 27 has some good beginner pieces with beautiful melodies and nice harmonies. "A little song" is a great one to start with once you are comfortable with reading music.
I am creating a piano course for adult beginners, it will be available on the 1st of September. It is free and you will get a strong technique basis: https://playingpianoblog.com/learn-to-play-the-piano