Hi!! 2nd current hoopings actually what i've been working on for the past month or so (newbie hooper, 3mnths!!) so since its still fresh in my mind i hope that i'll be able to help out a bit!
I really struggled with 2nd current hooping until i made 2 small changes; firstly footwork while turning- i didnt realise that since my left leg led while turning to the left, i'd have to lead with my right leg (so: step back with right leg, follow with left) if i was gonna turn to the right (shifting your weight to the opposite leg feels a bit weird at first but you quickly get used to it) and it took me about a week of sloppy footwork and awkward movements to finally realise that, but when i did it made all the difference and it's since actually increased my range of motion of the right knee and my body just feels more balanced.
Secondly, try to play with the outer space around your waist both while standing still and turning (as opposed to just dipping your hands inside the hoop) because it really helps you get more familiar with the motion and how you should move with the hoop (this really helped me a lot when i started chest hooping in 2nd current too).
I hated 2nd current hooping so much when i first began because it can be so incredibly frustarting to pretty much have to start from the beginning all over again but when you do eventually get it it is just so incredibly rewarding and its completely transformed my hooping (i try to include it in all my practice).
And yeah, just have fun with it! once you've got the waist hooping going steady try to add in a vortex or the wind up, try weaving with your non-dominant hand too....there's so much to explore with 2nd current hooping!!!!
Oh and also (almost done, i promise!!) reversals are a great tool for keeping more of a continuous rotation going so as soon as the hoop starts wobbling, reverse it and steady it in your 1st current and then go back into 2nd. This really helped me with vertical chest hooping because it helps you see how similar (and small!) the movements actually are because before trying that i'd make these ridiculously exaggerated movements which kept me from maintaining anything more than a couple of rotations.
I think at the end of the day what makes 2nd current hooping a bit harder to grasp is the fact that when you learn everything the 1st time around it kind of happened almost by naturally but with 2nd current you have to really understand your motion in relation to the hoop.
Hope this helped a bit (and also, on a completely unrelated note, your hair is fabulous- just had to put that out there!!!! :D)
(oh and last tip- try pulsing with your lower abs while shifting your weight onto the leg that's on the side which your hoop is turning in...as i'm typing this i realise that i probably should have led with this, lol, try it standing still first and then incorporate that weight shift into your turn-the ab pulsing thing is what i do to keep the hoop straight- and try a slightly heavier hoop because it's easier to keep up)
Sorry again for this insanely long reply, lol..
Much love!!! :)