Put it down correctly

Hello, I’m doing my A1 driver’s license right now, everything is actually going well but I still have problems with the switch down. When I switch down I sometimes have the problem that I have a slight “back”, although I’m already slowing down the clutch. How can I prevent it from driving even slower? Another question that I had is how to quickly switch down gears, if I have to stop from the 5 gears at once, for example, how can I go down? Nell into the 2-3 gear without having this “back” feeling? Thanks already in advance