The lance plays very differently from other Monster Hunter games. This is a concise guide to how to use the lance effectively in Iceborne.
Most of the information from my Sunbreak videos are still valid, so check them out too.
My thoughts on Lance in other generations
https://youtu.be/_owYPsj0e4Y?si=VTpVeus_A8PBKgEP
Guarding (Sunbreak)
https://www.youtube.com/watch?v=1dIP_5Rlv9s&t=32s
Movement (Sunbreak)
https://www.youtube.com/watch?v=Mx1g1tc9LVM&t=48s
Song is No Justice from Fire Emblem Fates