It doesn't matter when you start, just put in a half hour of flipping.
No, you don't have to comment on Anonymous posts.
You can comment with text, meme reply, or combination. Just keep comments positive.
Upvote each meme you visit. Anonymous ones, your choice.
For added fun, reply to some of the comments to confuse those people. Don't bother if their username is [deleted] as that account is no longer around.
I did a test run earlier and left assorted comments here and there. Confused people certainly.
If they ask why you commented, just tell them Swiggy said to comment and upvote.
The great thing about this game is, A: you don't hurt anyone and B: it's not limited to this day. You can make this a part of your daily routine here.
Keep comments positive.
Have fun.