Tips to Model the parts on this page:
1. Always use the chamfer feature instead of revolve cut.
2. When features are connecting to each other, always use surfaces to define the limit instead of a definites length or the value. This will help you while redesigning the part in the future.
3. As a learner, do try to visualize the parts using just 2D views. This will help you develop the thought process and will make it easier to understand all kinds of models and drawings.
4. Do not model, fillets/rounds in the sketcher itself. Always use a separate round feature.