I am in my junior year and have been offered to do a short school play during my senior year but I will only be starting on October (since that my senior year only starts a month or so before that). I will be doing the activity regardless of it being in my application (because I have a huge interest in directing) but this is still a huge activity that I feel like will tremendously help my application and activities list (which right now only consists of starting a club, few unpaid work experience, a summer program, and going to the gym).
I’m not sure of your question. If it’s “should I include this on my app even if I just started it” the answer is yes. Go ahead.