Harley as a beginner bike

Hello together, dreaming after years and now finally the financial means I want to realize my dream finally. Now surely many omg still one of such ones think but well.. I make my motorcycle ticket for a month and I dream forever of a Harley. I like very much the models DYNA Switchback or also the Fat Boy Special. These are only so optical decisions of course I want before I spend a lot of money these also test driving. Know me with the Detai My question is it is advisable as soon as I have the ticket to buy a Harley directly or should you first start with something smaller? My price concept goes up to 17-18.000€ is of course a lot. However, some I meant first with something small beginning to gain driving experience. However, actually I don’t want to drive any other machine. In the picture I have a attachment that has especially done to me Villeicht You have some advice for me. Greetings from Düsseldorf Marcel