But as its linked, when i pull on the front, it brakes the rear too, so i don't know if me using the rear brake as well makes things worse :-/
The Pans I rode also had linked brakes.
I still used the front first/most (why did Honda put two mahoosive discs there and not a giant one at the back?) and used the rear as well. If you use too much rear, it will lock/ABS but, if you already have a large handfull of front, it will make no appreciable difference.
As said, time for a move from learner lessons to advanced lessons. Its not just braking but road positioning, anticipation, cornering techniques and reading the road amongst others.
Done the bikesafe thing for quite a few years and its amazing how many mental light switches get switched on in riders eyes, just by a (free to them) Saturday or Sunday powerpoint and ride out with the Polis...
