Any tips for OTB blitz?
Fet, I'm also doing a 3+2 and a 5+3 tournament soon... Are you sure we're not doing the same tourneys lmao
About learning the KID, I wouldn’t recommend to try and learn a new opening right before a tournament, as in many other activities. If you have a tennis tournament, you're not gonna change your racket or your shoes a week before the tournament. If you're confident with the QGD, I would recommend staying with it, but if you're not, the advantage if you study well a new opening is that it's going to be fresh in your mind for the tournament. You could also try to learn a less known line, which is often less study as you don't have to learn every line. So go with what you're going to be the most confident with would be my advice.
Good luck for your tournament and have fun !