We all have a first time for everything!
I have spoken with you lately quite a bit, I Have no doubt that you could do it.
What you need to do is have one of our knowledgeable amp guys walk you through it in real time. Have everything ready to go, and I'm sure they could coach you through it.
But if you're really worried, pay the local dude but see if you can watch him fix it, then you'd have real world experience.
Also, there's probably a youtube video covering this. I'd volunteer, I know the tech end, I'm just not so good of a teacher.