Hello all, as a quick into I want to say how much inspiration Ive had from this forum, I would never attempt anything like this if I had not been through most of the 300 pages of posts. Ive been reticent to post as I am musically illiterate but there are a few questions I have not understood the answers to. So please bear with me. 

Long story short: I am building my 2 1/2 year old a CBG. My wife comes from a VERY successful musical family (jazz/classical) and I play records. My wife left me last year and took our daughter to Europe, and I have very little access. So I am building her a CBG to feel closer... Plus it will annoy her grandfather as "music died in 1957" and lets not even get into the whole American thing. Ive done lots of research but I have 2 or 3 questions.

So to my very uneducated questions:

1. How do you work out the number of frets to the length of the fingerboard? (in-fact how long should it be?)

2. How do I choose strings/tuning?

3. How do I choose the location for the bridge?

I really dont want to seem an idiot in front of my wife's family, so I do want to get this correct. In addition my daughter seems to be following in her mothers families footsteps and is already banging out tunes on the piano - so there should be room to grow. Im off to have a few Margs now. Many many thanks