I'm 30 years old with a rating in the 1800s and of course it will take at least a few years to go from that to 2200 if it's even possible for me.
By near future I meant when I begin going to tournaments and studying on a schedule.
In my imagination it wouldn't be very interesting as I'm doing it, but maybe someone could dig it up some day after I stop and say look, this guy only gained a few hundred points by doing ____ for ____ long, and it would be something for adult players to ponder instead of speculation... e.g. "no one can be rated _____ unless they start by 9 years old"
Goals of gaining 900 rating points in the near future always work out well, so sure, make the blog.