Hello!
You obviously have a board that is a bit too short for your size...
I am 190cm/82 kilos and am using the 175cm x 23cm wide Extremecarver model (Swoard ).
It is more adapted to your size and has a bigger radius probably than the Roadster 162.
Then its all about learning to do the rotation / push-pull technique described on this forum or on https://www.extremecarving.com site.
Good luck!
Nils