The phrase "got in to the act" means to get involved or participate in an activity or event. There are many synonyms that can be used to convey the same meaning, such as "joined in", "participated", "took part", "contributed", "pitched in", "got involved", "became a part of", "took action", "got hands-on", "engaged in", "partook in", and "became active". Each of these synonyms can be used interchangeably depending on the context in which they are used. It is important to choose the appropriate synonym to ensure that the intended meaning is accurately conveyed.