I got the hand brake on my Stark. I instantly fell in love with it. I thought the same thing that I would be all out of place going between clutch and non clutch, foot brake and hand brake. But it's super intuitive.
After riding multiple bikes (KTM 500, Husky TX300, 350FX, 501, CRF250F, Sur Ron LB) back and forth with the Stark on the same day, I can positively say that your muscle memory shapes up quick. Yes, there might be a very slight Oops every once in a while. But it's nothing that will get you in over your head unless you don't take time to warm up first.