as much as i dislike u, but here goes.
dont open too much throttle, u will get used to it next time. and
yes, gear 1 must 1/2 clutch, u cant release clutch otherwise u sure
stall engine. u know when u at 1/ clutch, ur bike will move abit.
when moving, u play ur throttle abit. u turn slowly by slowly. not
straight away 90 degrees.
if u going at low speed, around gear 2, u can just clutch in then
kick down gear. but dont clutch in too early, as very dangerous.
free wheeling, as u move further, u wont have this problem anymore.
practice will make u better, i 1st prac cant even move bike.