Droid RAZR Utility, has taken all but the most unique situation problems and wrapped them into a 1,2,3,4 menu selection process. If you can follow simple instructions and don't suffer too badly from ADD or ADHD (I am a tad both, I think), then you should be alright. Given that you've walked the walk with the Blackberry already (and 'thems' was the "Wild West" days), then I am confident you'll come out shining like a newly polished pair of riding boots!
Go to the FoxKat's Razr/Maxx Jelly Bean Leak Classroom W/MattyP & Friends thread, read the OP through completely once, then for good measure - read it again. Once you're confident you have the steps down, do a dry run...using the instructions go to the various menus and see what they look like. Then download the required drivers and tools and prepare yourself for the wormhole into the new dimension that is Jelly Bean!
Don't forget to say "HI!" over there, and don't be a stranger. You're now a part of this family and you'd better act like it!