Rajagra, if you swapped the Ctrl and Fn keys on the bottom left corner, you'd have the same layout of those keys that I do. That made reaching the Ctrl key quite difficult, curling my finger under and frequently missing it, so I just swapped it with the caps-lock key.
Where you have your backspace, I now have Ctrl - will be a lot easier as I use Ctrl a lot and it's now right next to a home key.
Just did some more tweaking and I'm now getting used to using right thumb for backspace, left for shift - for the very logical reason that I remove my right hand from the keyboard a lot to use the mouse - so having to move my left hand away from the keys every time I need to shift-click something using the one shift key I had on the right of the board, was a rather silly way to do it.
So I remapped the keys so that my previously remapped shift and backspace keys are swapped. Now I don't have to move my left hand to shift-click while using the mouse. Can Ctrl-click a lot easier now, too.