cadet on a small C152.
Have never flown a big C152 or even a medium C152. But regardless of the size of the C152, if you are experiencing trouble with landing the aircraft, simply ask the instructor to demonstrate a landing. He may need to do that several times and he doesn't necessarily need to patter. Sometimes silence is golden and allows you to concentrate on seeing rather than hearing through a headset. Students can be overwhelmed with gimmicky ideas and when approaching the round-out they can quickly forget who said what and when. It may cost you more money each time the instructor does a demonstration landing but some or later it will all come together. The more you bugger up landings without knowing exactly why, the more you lose confidence.
Half an hour in a desk top simulator of any trainer aircraft type can do wonders to help judge the landing technique and you don't have to waste money on full circuits either. The simulator (flight training device) can be repositioned at 200 feet agl to give repetitive practice at that last 30 seconds of short final.