Hoi Marcel,
Welcome to the forum !
I myself started playing organ at the age of 10 (I'm 46 now ) and play keyboards since 15 years.
The Ketron SD1 has a great piano-sound and the keys are 'semi-weighted' so I too like playing 'piano'..... I wish I had started with piano lessons.
To be honest, I'm a (so called) Autodidact and tought myself playing organ after 5 years of classic trumpet lessons.
Anyway : Glad you joined this family !
Frieslan boppe !
Roel
Coevorden