Hi Beardy Jonny, welcome! Use your own judgment about when to move to the next lesson. This question is asked a lot, because all of us newbies are a little worried we will move on only to discover months later that we needed to spend more time on these lessons. Here's the beauty of that though: the lessons will still be there. You can go back.

What I think most of us do is exactly what you are doing. I tend to loop back to previous lessons fairly often even as I move forward. I do it for a couple of reasons. One, because I feel like maybe I need to review something that doesn't feel quite right now. Two, because I want to see if I've improved on that earlier skill as I've moved forward. As you move forward you should be improving on everything that came before because you'll be using all of those previously learned skills. I like to go back and play those earlier songs and see if they are sounding more like music than they did when I went through them the first time.

Good luck, and enjoy the journey!

Dave...