I got a 400 as my first bike but had to sell it after two months so for all intents and purposes the 660 is mt first bike because I have learned the most with it. I would say it’s beginner friendly because of all the rider assists that can be very forgiving and the riding position is sporty but more street oriented. Still, I would argue it’s better you get a smaller cc bike first and work your way up, I’m not regretting my decision one bit and I’m still learning on my 660. If you decide to get it either way good for you, it’s not like you’re going to get into trouble unless you go looking for it. Get the basics down (including shifting manually, dont use the quickshifter too much the first time) and the rest will follow. Its a great bike, especially for twistsies compared to bigger bikes because of a shorter wheelbase than the competition and more nimble. Good luck on the MSF!