How to train the model using a smaller dataset?

Hi! I am a undergraduate student and first exposure to autonomous driving. I am trying to get bev feature from this dataset, but I don’t have too much gpu ,so it is difficult for me to use the whole v1.0 dataset,but mini is too small to the model , do you have the method to transform the nuscenes whole dataset (v1.0) to a smaller one? Thank you very much!