DH & I were in WDW last week and our DHS day was Tuesday, 2/9. Thankfully we were successful with getting a boarding group & riding ROTR. We are now 3 for 3 with getting ROTR BG's & I attribute it all to all the helpful information on the DIS. In Sept 2020 we were successful on both of our DHS days.
We were staying at the Swan and DH was on our balcony and I was in the hallway. DH used data and I used the Swan & Dolphin WiFi & I was the one who secured our #46 boarding group. We were called at 1:20PM.
My advice would be read, read, read (& learn) all you can about obtaining a boarding group. Practice. Get familiar with the screens and process. There is so much info on here and so many helpful folks with great information! Your party will be preselected so like others have said, just keep clicking join, join, join as soon as your clock turns to 7:00am/1pm.