Tutorials are given in the documentation. You may want to read:
- Creating Our First Model
- Using Neural Networks Part 1 & 2
- Using Neural Networks With Reinforcement Learning
For the models, you can choose the ones that are under “Classification + Reinforcement Learning”.
My recommended models that probably versatile in most use cases is the Advantage Actor Critic. Though it may be a hassle to set up, so have a look at the source code provided to you for the self-learning sword-fighting AIs (version 2) for reference.