Do you give private lessons in person or via Skype?
Sorry, I only teach at Musicians Institute. If you want lessons in the Los Angeles area I recommend Ed Finn.

I picked up two of your books at once. Which should I study first? Can I work with two or more books at the same time?
If you were in a formal program you'd be taking several classes at once. Similarly you can work from multiple books on your own as long as you are able to study each one several times per week. None of my books have difficult prerequisites so it is OK to take them together or in any order.

How many minutes do I practice each thing, and how many weeks do I keep it on my practice list?
I could only tell you this if I watched your every practice session and constantly tested your ability to apply what you've learned. A private instructor can help, but you should learn to take responsibility for your own development and your retention of material.

When you can apply elements of an exercise in the course of pursuing any later one that requires it, that means you know that exercise well enough to retire it from your practice schedule to make room for advancement. If you are unable to apply it when you need it, it's time to go back and review.

To learn anything takes repetition, so your first practice schedule should include reminding yourself daily of the above guideline for moving ahead in your practice. Otherwise, you might forget it and find yourself either 1) repeating stuff you already know when you could be moving ahead, or 2) setting material aside before you really have a handle on it.

I'm a left-handed player. Will the diagrams in the Guitar Fretboard Workbook work for me?
Yes. Briefly turn the book upside down. A horizontal neck diagram is now a mirror image of your right hand and the fretboard. With practice you’ll make the transfer in your mind.

I'm a bass player. Will I be able to apply the material in your books?
Yes, although some of the examples may be unplayable for you, the concepts are universal and apply to every instrument.

Is a C# Major scale really spelled with these notes (C# D# E# F# G# A# B#)? I've never heard of E# and B# before. Aren't they really just F and C?
These are enharmonic note names. You'll need to use them if you're going to read or write music or study basic theory.

A simple rule for spelling major scales is that you must use each letter one time. That means no major scale may contain both C# and C.

In other tuning systems besides the one used on guitar (equal temperament), notes like B# and C actually sound slightly different from each other.