I played piano for the first time today

So I found a 700$ electric piano by the trash the other day and brought inside and bought a charger on Amazon and it works 100% kinda wild

I play guitar (for 15 years) but finally got the chance to play a piano. And on my own home even! I've dreamed of it tbh. This is like 5min into me playing, should I keep playing? I'm 28, idk how long it takes to get "good" at piano. I wanna learn like final fantasy music or horror music maybe? Can someone tell me what tabs to like learn? Or where to start. If I should buy sheet music? Seems easier than phone?