@sam-draws Hi Sam, good job with the drawing.
The only feedback I would offer at this stage is to ensure you are drawing more from the shoulder, as is demonstrated in one of the early curriculum classes. Maybe that's required less when drawing fiddly details, but certainly with the longer lines.
Simply drawing more will improve your line quality and you'll be getting plenty of practice in the coming classes, so I wouldn't worry too much about that right now. You'll be putting into practice everything Jake discussed for the rest of your life! Ha ha!
As for your other questions, I'd say that the idea is to get comfortable with the techniques Jake has discussed, and then move on. If that means to find more images online then so be it. But don't spend too much time looking for things to draw. Just draw anything. If you can get outside into the fresh air and draw things in the world around you, then great! However, the techniques really are about how to draw everything so they won't be specifically referenced in upcoming classes, although you will be expected to be comfortable with the techniques then.
Hope that helps.
Keep on drawing!
Adam.
UK