Reddit mentions of Adult All-In-one Course: Lesson, Theory, Technic - Piano Course Level 1

I'm mostly a guitarist, but I always loved noodling on piano but wasn't really happy with any of it so decided to learn a little - what helped me the most personally was 1) learning the main scales, just major and minor, until you can play them easily (the formula is really basic and shouldn't take too long to get down really), and 2) learning a bunch of basic chords, which can be done pretty quickly by getting a beginners piano book (something like this https://www.amazon.com/Adult-All-one-Course-Technic/dp/B002N002R6/). Plus plenty of noodling using what you've learned. Those two things alone took my playing to a level where I can just sit down and have a lot of fun. I find piano way easier to come up with interesting stuff than guitar, due to how its laid out. There's lots of other great advice in this thread already so I'm sure you're covered but I wanted to throw in my 2c just in case. Good luck!