It's not hard, you just need to be aware, especially in blockstrings, if you have a high ground (A or C) bumper (though I usually keep mine low) against standing opponents in a blockstring, you can do RC -> j.C 3/6-dash mixup. It's a mixup + crossup.
Just play normally, add a few bumpers here and there, try to go for 2-3 during a match at most and of course, mix it up. If they don't tech and get hit by the D-nails, you can get a tech trap, or just plain old oki. In that preview video, I showed the 3 mixups with the 5A 5B 2B 2C 214B d.2A 5B j.AC236D setup.