Don't be afraid of the forks. I'm 5' 10" 185lbs and I haven't bottomed out the front forks a single time. Just ride normally, anticipate your stops, and you'll be fine. Sure, an upgrade wont hurt, but as a beginning rider you need to be concentrating on the fundamentals and forming good habits. Coming in super hard into stops enough to bottom out the forks (except in an emergency) is just bad practice. Be safe, have fun, and enjoy your new Grom!!!