Stress while parking backwards

Hi there, I’m new here in the forum, because I’m a driver’s driver and I’ve been driving my Christel since Friday. I thought I’d still drive the driver’s license at almost 40. It all worked out wonderfully at the end of July. Of course I wanted to drive a car quickly. Since I live in a big city, my choice quickly fell on a smart. I picked it up on Friday. Had done a test drive before and found that he didn’t have a servo. But my real problem is that I can park zero with the Smarti. It always worked great in the driving school with the “luxury car”. I can estimate the kind of zero and estimate it. But the bigger problem is that Christel drives too fast when driving backwards and jerks. If you give too little gas nothing happens and you push a little bit further. he a big, fast set, so I almost made the acquaintance of the car behind me. Are there any tips or tricks to let the car roll back slowly? Or am I just too stupid and have no feeling for it? I am looking forward to your Rpckmeldungen.