Just like guitars, guitar picks come in all shapes and sizes. And like many other aspects of playing guitar, the pick you ultimately use depends largely on what type of playing style you develop and what is comfortable to you.
I would recommend that you work your way up to a medium thickness pick as that will be flexible enough for strumming, yet rigid enough for single note picking.
Either way, picks are cheap so grab a handful and test drive a few of them until you find something that feels good to you. I usually take a couple of different size picks with me to gigs so that I can be ready for any style of playing.
Hold the pick between the first finger and thumb so that the point of the pick is perpendicular to the plane of the bottom part of the thumb.
You will need to leave enough of the pick visible that you have sufficient surface area to strike the strings, yet not so much that you loose your grip on the pick. This is all trial and error and will feel more natural after you have logged some time on the guitar.
Learning how to hold the pick, and the guitar, can feel a little awkward at first, but don’t get too frustrated. Before long you won’t think twice about it!
Please do not hesitate to contact us with any questions!