I m working on “C” major & “G” major scales in 3 books I have now. One of them has simple songs. I started out 30 minutes/day and now doing 40 minutes after about a month playing. However like today it went really pretty good compared to prior in the week and before I knew it 45 minuted had passed! So I stopped and am happy with my slight improvements. Thinking of taking lessons however Would probably help me improve much more plus stop any bad habits I now have.