I think it might be a little harder to train obstacles by yourself than if you had help, but it's not impossible. Using targets might really help. Like training the tunnel, at first shorten it, put a treat on a target (a rubbermaid lid makes a good target) and go to the other end and let your Rizzo run to the target, through the tunnel. I taught Lizzy the jumps by using my hallway. To get to the treat, she had to do the jump. I'd throw the cookie past the jump and she went after, over the jump. After I felt she understood what the jump was, I took it outside.
As you progress, and Rizzo has learned all the obstacles, then the learning focus switches to the handler and dog as a team. Front crosses, rear crosses, and things like obstacle vs handler focus. Getting the dog to work away from you vs coming in to you, and things like training 180's, stuff like that. It's so much fun, and always a challenge. I love it!
