Hey Manager, although we can't disclose the start date of live events in advance, make sure to keep an eye on the Home screen banners, since all information about the upcoming events, including Hot Shots, will be available there. Also, don't forget that you can develop Playstyles in other ways as well - through training sessions and live matches (League, Cup, Champions League, Super Cup, Super League and friendly (home) matches).
Best, macmag123