its gonna be hard to grab the nose with your back hand so (if you arent already) try grabbing the nose with your lead hand, but make sure you keep your arm against you so you dont do a 180 (unless u want to , which would be cool)
it always helps to get more air too
now with the tail grab, bring up your legs to you and make the grab. just make sure u release your grab before you hit the water. if u want you can poke your front leg for more style. right before you land you might want to bring up your lead leg a little bit so its not going straight into the water.
just keep trying it and you'll get in no time. hope this helps. good luck