RBT is different in all movements.
First, rest your fingertips on the front edge of the raised RBT buttons.
The purpose of this is to let your fingers discover that it doesn't need to curl forcefully to perform an action.
Second, move the RBT around in a circular direction, both clockwise and counterclockwise while keeping the fingers where they were.
The purpose of this exercise is to let your hand discover there's a new way to move the cursor, squeezing from side to side is no longer the only option for movement. You can push and pull the entire RBT back, forth, left, and right by using only your index and middle finger tips.
Third, look at the palm side of your hand and notice there's space between your palm and the body of RBT. Slide your hand back if you have to. If you find your hand hovering on top of RBT and your palm is resting on it, you're doing it wrong. There is no palm support for the RBT, because surface contact causes sweat and suppression.
Fourth, lift your index finger while keeping the middle finger on the edge of the raised RBT buttons. Then lower your index finger while keeping it straightened. The contact surface is likely somewhere between the second and major knuckle. Each person may vary due to different hand sizes. Remember this position.
Fifth, Keep your index finger relaxed on the raised RBT left button and lift your middle finger. Then lower your middle finger while keeping it straightened. The contact surface is likely somewhere between the second and major knuckle but is usually different than the location of the index finger's, could be different for each person due to length of your fingers and width of your palm.
Sixth, look at the height of your elbow. It needs to be equal or slightly lower than your wrist. Lower your chair or raise your table if you have to.
Kick you legs up on the desk if you feel like it!
This may seem counterintuitive to everything you've learned about ergonomics... but hey, try it for yourself.
If you've completed the above six steps, then you should be on your way to mastering the use of RBT in no time.
Repeat step One through Six if needed.