Acoustic guitar lessons
The most commonly listed lesson type in the UK, and usually the best first instrument because no amplifier is required to hear yourself. Lessons cover open chords, strumming patterns, fingerstyle basics, and singing while playing, which is harder than it looks.
Songs drive the material, so the technique arrives attached to music you already like. If you own an acoustic and have never had a lesson, this is the obvious place to start.
Start here if: you already have a guitar at home and want to play songs you recognise.