go arounds
Hello again
Grass/tarmac will have a bearing on landing distance. Landing distance is a defined term and allows for normal braking after touch down. Breaking on grass can lead to skidding should it be wet or soft and therefore the landing distance will be longer than on firm ground or tarmac.
Should the runway length not be an issue then approach speeds are unchanged grass or tarmac or whatever but never land early. Induced drag, produced while airborn, can be far more effective than heavy braking on the ground which, if you land too early, so therefore too fast, will be poor on any surface owing to the a/c being light. Enjoy flying the a/c, do not be so anxious to land. Who wants to pay in excess of £100 per hour to drive along a runway when you could be flying. The secret of achieving a good landing is by trying not to! Tease the ground, do not let it have you before it's time!
Partial flap/ full flap or no flap at all the a/c will land just the same. It's just a matter of when. I teach my students partial flap initially - i find it helps them hone their skills by giving them more time in the hold off to learn to control the aeroplane prior to the touch down. They then learn max flap precision approaches ( i hate the term 'short field' )later.
Talk to your instructor in more depth about 'go arounds' but also about attitude for speed / power for height to get clarification. It isn't really as simple as that. All powered flight is about matching power with attitude to achieve a performance. i.e. you could be too fast because your power is too great or too slow because your power is too low and all the while your attitude maybe correct. So to chase the ASI ( which suffers from a considerable amount of lag )with attitude may lead you into a fools paradise.; Always think power/attitude for they work together. How or what technique is used in achieving the final result must be left to you and your instructor. Whatever the personal preferences that i have in regard to approach technique i will keep it to myself - many ways to skin a cat.