Welcome!
Team Practices are automatically scheduled on the calendar and take place in the background as you advance through the season, so they're basically already automated. You can choose to swap around rest days and assigned practices on the schedule if you want, but otherwise it's already taken care of, so you'd be fine to just leave everything as it is.
There are some further automation settings that you can mess around with if you want to streamline the experience:

You can find them in the Settings tab in MyLEAGUE, as well as navigate to them while setting up a new save. There may be a couple of things in there that you want to switch off of Manual so that you don't have to worry about them.
As I said though, player training is already essentially automated. There are separate practice functions that are gameplay-oriented, but those are just for the benefit of sharpening your skills on the sticks and don't have any impact on player progression.