I have both a 150cc scooter and a Super Tenere. But, I only got the scooter for local errands and commuting a year or so ago. I have about 400k of motorcycle riding experience and about 8k of scooter riding experience. I rode around Egypt on a 150 scooter as well. 2500 miles in 11 days. Urban to desert, dirt, cobblestones, epic rain, sand, etc. You can do a lot with a scooter. It's far easier to manage challenging conditions on the scooter than with a 600 lb motorcycle.
Your observation and survival skills from the scooter are a direct application to a larger motorcycle. You gain the ability to accelerate away from potential danger that you don't have on the scooter. Plus better braking, etc. Awareness from other road users is a wash. I think more people notice me on the scooter due to the cuteness than do on the big bike. I rarely get tailgated or cut off on the scooter. Each bike needs to be ridden differently in some regards, using the strengths and being aware of the limitations.
I would suggest you start motorcycling with something smaller than the Super Ten. You're plenty big enough to ride the bike. That's not the issue. Getting used to the much greater weight and learning to ride off pavement is. You'll find the learning curve a lot easier on something a bit smaller and lighter. If your prime riding goal is touring, it's less of an issue. The first time you put your foot down at a stop and find your foot sliding out, you'll be happy to have a lighter bike.
This isn't a bad article to read:
LINK The DRZ400 will do a lot of what you may want to do and is relatively cheap used and easy to modify to your preferences. At 322 lbs, it's about half the weight of the Super Ten when accessorized.
I hope that helps. Most long term motorcyclists started riding on the street with smaller bikes. I started street riding when I was 21 on a CX500. It was light, easy to get a foot down and cheap to fix when I dropped it. Which I did, and crash, etc. Consider taking the
MSF or equivalent Basic Bike-Bonding RiderCourse. It will really help you get familiar with the new to you bike and how it handles.
There are several bikes in the 650-700 class. Resist the temptation to get a shiny new bike that you feel will be 'the one' for years to come. You will drop it. Many a first bike got nicknamed "scratchy" by their owners.
And if you really get out and ride it, you'll move on to something else sooner than you think. Getting your comfort and skills down on something you don't have to stress about dropping is a good thing. Even if you only ride it for a year or less before moving up to something else.
Welcome to the forum. Please take a few minutes to fill out your profile and add your location. Even if only state or country. It helps others to give you more accurate answers and gives your posts context as well. Often putting your comments into better perspective. For example, if you're scooter riding in a high density urban environment, that's a different skill set from rural township riding.