Why do I need Container for AWS SageMaker? If I want to run Scikit Learn on SageMaker's Jupyter notebook for self learning purposes, do I still need to configure Container for it?

What is the minimum configuration on SageMaker I will need if I just want to learn Scikit Learn? For example, I want to run Scikit Learn's Decision Tree algorithm with a set of training data and a set of test data. What do I need to do on SageMaker to perform the tasks? Thanks.