I'll keep this post updated once in two months with the rating on here.
Your online blitz rating will not help you reach GM. In fact, it is more likely to hurt your chances of ever accomplishing that.
Indeed , that's already a bad start as improvement in on line blitz doesn't always correlate with improvement in OTB. You need to play real tournaments and compare your progress with real rating.
don't think about becoming a grandmaster, just enjoy your chess games and try to have fun around :)