I have known Twitter for a long time while I got to know the existence of Discord only when I joined Steem in June last year. Based on such experience, it tells me that Twitter is way much popular and has wider social reach. So indeed, it will be a great way to present Steem and have it known better by the world!
I just saw about it so I also want to greet you, belated happy birthday @nathanmars! Kudos, more power to you and all your initiatives!