I found a second hand Crafter electro-acoustic in a local music shop, it’s a really nice instrument. Last Christmas I bought another second hand acoustic from a lovely music shop in Stamford, a Gretsch Parlour Guitar, came complete with a hard case. It’s a bit smaller than a standard guitar so a bit easier to take somewhere. Trouble is, I’m running out of space to keep them all….!
As for improvising, use the relative minor pentatonic scale for whatever key the song is in and go for it! Start with the root note on the G string, very enjoyable!

