r/synthesia

I’m 50 years old and I always regret not learning to play the guitar. My three girls and wife are very musical though so we have a electric piano at home.
This weekend I stumbled upon some YouTube video of something like a guitar hero (which I love) for piano… I started to play and discovered how fun and ”easy” it was.
So I bought synthesia and ordered some cables so I can connect my keyboard.
I am not after to learn how to play fluently, if I learn to play some songs just follow the ”dropping notes” it perfectly fine with me.

So what tips do you have for a absolute beginner like me?
Should I practice one hand at a time?
Do repets of small pieces of the song?
Should I focus on one song at a time or switch between different songs?