Yo man... Nice to see you started your sketchbook.
I would say though, on that picture with the cell phone. Decrease the image size when you post them. The max size is 1000. It took up all my screen space lol.
when I save, I usually go for (save for web- size 800) in Photoshop.
Yessss man! I like the title "Journey through a thousands of sketches" Thats the right attitude man! A small crit I have is to watch your edges. Especially on the phone. Make sure your edges are nice and clean, because at the moment, they are a bit jagged. Spend as much time as you have to try and get the painting as close as possible to the subject matter. Keep them studies comin.