SportsEngine is a great tool to manage your lacrosse schedule and receive communication from your coach, your team manager, and the association. 

You should have received an invitation in your registered email to join your team in the SportsEngine app. That will give you the team roster, chat, and other information on your phone. Please make sure you have it if you can: SportsEngine chat will be the fastest way for us to communicate changes in games, cancellations, or other important information that needs to reach you quickly.

You can also sync your own Google or Apple calendar to the team calendar. This SportsEngine help page can help you set that up.