TS, from what I read, I think u are not ready for your test
yet.
" My parking not very good, for parallel is okay but always not
straight "
to solve this problem, make sure what u see at the front
dashboard and side door of your view are parallel with whatever
things u can find to compare (kerb, walls, anything outside your
car) And of course, lots of practise.
"except I tend to lag behind the car in front of me "
Its very normal to lag behind other cars because you are not
going speed of excess 60kmh. Your speed for the test (on road)
should be below 60kmh.
"my car usually is closer to the centre line"
To solve this, try to vision yourself slightly off centre of the
lane. Or, in another words, your steering wheel slightly off the
centre imaginary line of a lane.
