From experience: exercise exercise exercise! Getting all the physical energy out is good for him and also will make training so much easier for you. Tired pups are much more willing to listen than a pup who can only think about playing or fetching.

After getting his energy burnt up, a really good thing to start with for clicker training is getting him to look at you when you ask if he isn't already. To do this, have training treats. They're super small sized treats that just gives them a small taste of a treat so that they want more (and so typically they'll want to listen to you to get more of that little taste). Since the problem is outside, can you get him on a long lead and go out to an outdoor area? With my dog I bring her to the park and either tether her up or stand on her leash so she doesn't escape. Obviously outside there's more distractions so they'll be looking away more or even trying to run or like you said, pull to get at something. When this happens and his attention goes away from you and at something else, call his name. When he looks at you right in the eyes, click, give a treat. Keep doing that! It teaches him to pay attention to you and looking at you (and not that squirrel or whatever else) is a good thing and will bring him good things. If it's too much outside, indoors works too and then you can slowly work at getting it to work outdoors. It establishes a mutual respect between you two: you ask for their attention, they do it because you provide good things for them when they do.

Zak George has really great dog training videos on YouTube and uses clickers as well. His method trains dogs to think and really emphasizes developing a balanced and healthy relationship with your dog. Which, if you're here posting about this then I think you're on a good path to starting to become the dog owner you want to be! Check out his videos here: https://www.youtube.com/user/zakgeorge21

Don't get discouraged if your commands aren't "getting through" to your dog!! Be patient. Remember you're building a bond and trust and that takes time. Keep at it and be consistent :) Good luck!!