Wow, Bill. That was basically going to be my response verbatim. Thanks for saving me the time
Honestly, the most challenging aspect of what you want to do will probably be humbling yourself and starting over. You seem to lack basic computer skills that children in their early teens have nowadays. I apologize for being blunt, and I'm not trying to be rude, but if you don't genuinely appreciate what lies ahead of you, you're not going to be successful.
With the amount of ground you have to cover, you're probably looking at 5+ years to get where you need to be to do such work adequately. You'll probably have to get your foot in the door with basic systems or network administration and then work your way into security.
Having said that, it's certainly possible. There have been others who have been older and had less experience who have made the transition. Resources like this website will provide you with excellent direction. You're going to have roll your sleeves up and dig in though. Simply getting a cert or degree won't lead to true success with that type of work. You need to have an insatiable desire to understand how things work internally and the patience, persistence, and perseverance to work through the obstacles you'll encounter.
While you have a nice broad sample of books, you need to pick a starting place and focus on that. You're going to spin your tires and ultimately get nowhere if you try to learn systems, networking, and programming simultaneously. Develop a road map with short-term, manageable goals. You'll be astonished where you end up in a year or two if you can stick to such a plan.
In regards to Capella specifically, I'm extremely wary of for-profit schools, even if it is accredited. That just rubs me the wrong way and makes me question their priorities. Anyway, for any online school you're considering, make sure it's regionally (not nationally) accredited, and do some googling to find what current and past students think about it.
Review the other centers of excellence. This is one program I'm considering: http://www.scis.nova.edu/masters/msis.html
It's a B&M school that offers that degree online; there's no distinction between the online or on-campus degree you end up with. There are several others like that out there as well. Just do some research and trust your instincts. If something seems to be too good to be true, it probably is.
Also, keep an eye on SANS' masters program. I know they've applied for accreditation and if that's granted, that could be a pretty good route to take. You'd also end up with some stellar certs in the process.
Finally, how about some weekend homework?
Download VirtualBox or VMware player and get one Ubuntu 10.10 and one Backtrack 4 VM installed and running. Home lab in a box.
Extra Credit: Use Nmap from within Backtrack to identify the default services running on your Ubuntu system.
(courtesy of sil). I don't think the timeline's feasible for your current skill level, but that provides some additional direction.
The day you stop learning is the day you start becoming obsolete.