Which motorcycle for A2 newcomer

Hi, I passed my A2 driver’s license a few days ago and get it in a few weeks (only on the 18th birthday). Now I have saved 3000 euros and would like to buy me a new motorcycle by installment payment or 50/50 financing. At first I wanted to get the Honda CBR500R, but I find it a bit stupid that it has no gait display. But now I have seen the announcement of the new Kawasaki Ninja 400 and I like it very much. The Ninja 400 is still nice. My concern, however, is that I have heard from many colleagues who are already riding a motorcycle that I should rather buy a bigger machine (600-750ccm) and then throttle it so that I can drive faster without any problems after the 2 years after I made the normal motorcycle driver’s license. My questions: 1.Which motorcycle is good for a newcomer (have nothing against Naked or Cruiser) 2.Does the Ninja 400 2018 recommend it? 3.Does buy and throttle larger ones or is 400-500ccm ok(vlt Ninja 650?)? 4.Does the Ninja 400 or the CBR500R have a Sozius with corresponding footrests? Hope you can help me.