Well done! I'm sure your son would show you what he did, so that you can do it yourself the next time. You've got brilliant spirit to show such determination.

fwiw, I'm coming up to 45 and am a newish rider with a HardRock too. I love mine. If you're not riding very bumpy ground, have you thought about setting the front suspension to off (red) rather than on? That might feel a bit more efficient and is very straightforward to do.

I hope you enjoy both bikes!