I started to worry about this as I got older, so a few years ago I got a Kinesis Advantage keyboard at work and home with the control and meta keys mapped to the left thumb buttons backspace/delete. I was able to break the left-pinky control habit by mapping my CAPSLOCK key to a noop.
The Kinesis took a few weeks to get used to, I sped up my progress by competing in typing races on typeracer.com until my speed got back up, and eventually surpassed my speed on a conventional keyboard. The square, curly, and angle bracket keys took a lot longer to get used to, and it was months before I got comfortable with them.
Wait till RSI kicks in. Vim was a real relief when chording became intolerable (even with remaps like ctrl->caps).