Learn to drive with either weekly driving lessons or an Intensive Driving Course.
Yes, you can fail your driving test if you are unable to perform the manoeuvres. For example, if if you're too wide on a reverse around the corner, you're too far away from the curb on a parallel park, or if you hit the curb too harshly when practising a manoeuvre, then you may find yourself with a test fail. Ultimately, the decision is down to your examiner and depends entirely on the situation.