Definition of purvey. purveyed. ; purveying. transitive verb. 1 : to supply (as provisions) usually as a matter of business. 2 : peddle 2.
Using a capo is easy. You just have to think of it as a movable nut. Clamp it on the fret you will use for the key you are playing in, and just play chords or picking from a key you know. You can play in G using chords from the key of F if you put the capo on the second fret.
The surest way of getting your ukulele in tune is by using a chromatic tuner. The tuner I use is a Korg CA-30, which I believe has been discontinued and replaced by the Korg CA-40 (pictured above). For the price, the Planet Waves chromatic tuner has received good reviews too.