5'7's a pretty good height. I say as far as spinning's concerned, learn more moves like the eclipse (Obi-Ani), Reverse grip (inverted grip), Plum Flower, basic turning, basic movement, strikes, etc.
DC teaches the eclipse (Obi-Ani), in his first video
https://www.youtube.com/watch?v=dKXqekMvo2Y&list=PLf2BA9eUktws29zZjesedQ996qS8oYEpt&index=2I say learn this move because coming out of the eclipse (Obi-Abi), was where I learned to add a toss. I would start wide exaggerated sweeps and just throw it straight up to see where it would go.
At first it was a bit scary since like yourself, I was afraid to drop it but that's part of spinning, you'll drop your saber and once you stop worrying about it, you'll drop it less. As always, learn on your non-dominant side as well.
You'll start to understand and know where to let the saber go and where to catch it. After a while, you'll get into the rhythm of how your saber will fly in the air and you'll start to toss them closer and closer to your body. A drill that helped me was to toss a saber in the air with one hand and keep tossing it until my arm gets tired or I drop it (thanks to Samhain). Then, I'll switch sides
This video here is forward a little over a year from when my flow art journey began along with tossing. At the 37 second mark, my first toss, I'm facing away from you so it's a bit hard to see the toss but at the 56 second mark, I'll toss the saber with my non-dominant hand facing the camera relatively close to my body. I don't remember when I started doing this, another member just pointed it out one day. You'll get to the point where you'll chain all the moves together along with tossing the saber and keep going having a nice and tight form.
I'm sure since you've visited Darth Cephalus' YT page, you've come across his tutorials, its good and he gets into every part of flow work form the basics to intermediate and advance moves
https://www.youtube.com/playlist?list=PLf2BA9eUktws29zZjesedQ996qS8oYEptThe Tutorials page (I'm sure you've already visited), is a great place the check out different tutorials like Jar'Kai (dual wield), or a bo staff. I do recommend learning with a staff since that helped me train with Reverse Grip (my grip of choice)
http://www.saberforum.com/index.php?topic=23125.0My advice to you is to learn moves on both hands while focusing on your non-dominant side a little more since it'll take some getting used to unless your ambidextrous that is. It was awkward for me to learn on my non-dominant at first but I made it a habit of starting my sessions with it and now it's as close to being natural as my dominant side.
Although I haven't submit a video to my page for some time (broken stunt sabers), I have been spinning my sabers daily but I did record my journey, check it out if you like
http://www.saberforum.com/index.php?topic=40088.0I say just practice, practice, practice and you don't have to put in 30 minute to hour sessions or anything. I practiced 5 to 15 minutes at a time and now train like that throughout the day several times a day. If you're stuck on a move that you just can't figure out or you're frustrated with, just put down the saber, walk away and do something without thinking about the move or your saber for a bit. Then, when you're refreshed, come back to it and try again.
Lastly, there's always a reverse version of any move that you learn and the reverse grip version of that. Then, there's the reverse version of the reverse grip so learn them all which will give you an entire arsenal of moves to use with your sessions, videos, training, and to just show off some good moves to people at cons and gatherings.
If you have any questions, feel free to PM me, I don't mind making a video to show you some things. There's a lot of highly talented flow art members on here including the resident Masters as well
One other thing since you're going to spin with your Flamberge, I noticed that your Flamberge a stunt with lithium-ion battery pack. From my experience since I've shattered like 5 or 8 of my stunts with that battery pack and the 4 AAA ones, try to insulate the pack with foam or rubber to absorb most of the impact when you drop the saber or smack it against the ground, wall, ceiling, etc. Trust me, it'll prevent or keep the battery pack from shatteringWelcome to Saber Flow Artistry, I sure hope you learn as much as you can!