In Sq Rumba, the count is..
Fwd left foot. Slow.. 2beats, same foot 1 and 2
Side, right foot on Quick, Quick, on 3 and 4 with weight change on each beat.Continue backwards on Right foot and repeat process.
There are schools of thought, that commence Sq. Rumba sideways on a Q Q
on 1, 2 .
If the poster is dancing Intern. style ( which I suspect ), then a simpler method may be this..
Walk fwd R foot on "1".. walk fwd Left on "2".. replace weight backwards on right foot "3" then Left foot back on "4".. pause on "1" NO weight change,
and then continue back on "2" Right foot.Exit Fwd left foot 0n "3" Right foot on "4".. NOW HOLD the "1" and break fwd on "2".. left foot and repeat process
We are essentially only counting 3 notes in the bar ( 2,3,and4 ).. the "1" is held to retain the correct and constant rhythmical sequence .
Once you have established the rhythm, you can begin to refine the basic concept .