I'm not sure if you're a troll or not and I'm not sure what you are asking, but here's an attempt at helping:
If you make a character your main, that character will permanently be your main character and all other characters will permanently be your alternates. If you want a different character to be your main, the ONLY way to do this is to delete your main and create a new character, then designate that character as your main. It would be nice if there were some other way around this but there is not. Your only other option is to get your main to level 31 and retire, then you can make them whatever build you want and even change your name, you would also get the benefit of heirlooming an item.
I learned a long time ago that you should read everything carefully and ask on the forums (not always helpful considering this community is almost entirely made up of trolls and people obsessed with homosexuality) before making any serious decisions in cRPG or Strategus.
I hope this was helpful.
