As I missed some handles and a pocket for my charger I pimped a basic white and black (ikea) laptop cover. I used a sturdy strap that runs from the front to the back forming a handle and coming back down again and so on. On the front I made a pocket with black and white chevron fabric, simply sewn under the black straps and with an elastic along the top seam.
So now I can transport my laptop and charger with one hand and don’t have to worry that it might slip out of my hands. A quick and simple solution. Maybe when I have more time I’ll design and make a nice laptop bag from scratch. But for now this works for me.