We encourage teachers in our district to look at what they are already doing in their classes prior to implementing Canvas. Then decide whether those lessons, activities, assessments, etc. can be enhanced within Canvas. Canvas is a tool, just like a pencil is a tool. We wouldn't pick up a pencil and try to figure out what math we can get out of it. Keeping that context in mind, Canvas is a delivery system for what you put into it. The content you put into it will decide how you use the tool. Just like good teaching with backwards design, think about your goals and what you want to assess and develop content from there.
That being said start off small! The teachers in my district that try to do everything at once are the ones that often become overwhelmed, Find 1-3 features of Canvas that you think might work for you. Start with those features and get to know them. Once you are comfortable, add another feature or two.