I'm guessing that you're looking for the middle C, being a keyboard player. If memory serves the middle C is in the 3rd fret on the 5th string. Then just use your scale patterns to figure out the rest.

W W H W W W H is the major scale pattern

Whole step
Half step

The chords are made up of triads 1,3,5

You already know the musical alphabet, 5th string for instance is A is the open string, A# is the 1st fret, B is the 2nd, C is the 3rd, then C#, D, D#, E, F, F#, G, G#, the next A should put you in the 12th fret.

By knowing the name of the strings, you can use this to figure out the notes on the other strings as well. I hope this helps, and good luck to you.

JD