Hi Aeriel,
I have had input to this already so I will keep it short and sweat, Master the basic climbing skill first,Stay with what is being said and displayed here and illustrated in books, These are tried and proven tree climbing techniques.They are used around the world every day by Arborist's. It's always hard and difficult at first but the more you practice the easier it gets.
Even before you climb a tree it should be assesed for structual weaknesses,You need experience to do this,Or you could have them assessed by someone thats knows. It could save your life.
I know working outside the the sqare helps most times,But really trees are out there by their own.My recomendations is to learn basic proven tree climbing,become proficient,Then once you have experience under your belt a lot of your questions and theories will instantly be realised.
Plan to live long, And be a burden on your kids...LOL. Climb Smart.
