10 seconds without correction hops , or in total ?
Either way , pretty good start . I found that having set the bike up correctly what helped most was just staying relaxed and loose over the bike . Did a lot of experimentation with arms straight or not , legs fully extended , or crouching etc . You may find it more comfortable to backhop with your feet not fully horizontal , try variations like lead pedal higher or lower . Good luck , keep us posted on your progress .