simplicity
I believe it is best to get the basics to PPL in the simplest airplane, just because there is quite a lot less to think about and thus a better chance of getting those basics right, quickly. Aerodynamics, communications, navigation, and weather are a useful workload for the novice pilot. Then add on the higher speeds, engine handling, VP prop, retractable undercarriage etc after you have the hours to be confident of the subjects I have previously mentioned.
(And an afterthought that a fixed gear airplane might cope best with some early attempts at landing.....compared to retractable)
(ah well OP, maybe your plane will be fixed gear anyway......I'm not sure about that !)