This lesson is split into 2 very different parts. The rhythm guitar part is played using a Chet Atkins fingerstyle technique on acoustic guitar, whereas the lead guitar part is a bluesy lead played on electric guitar (so this is essentially 2 lessons in one). I don’t use a thumbpick when playing fingerstyle, but if you have one and are comfortable with it, I recommend using one. Most fingerstyle players use a thumbpick because it really makes those bass notes pop. I’ve just never been comfortable with one.