These things take time, be patient and wait for the right members to help you forge your alliance. You should probabaly provide a link to your off-site forums in your first post so that people can go there and sign-up. A charter also shows that you are an organized and capable leader for people to follow, you should probabaly start drafting one as soon as possible.
Right now you seem unorganized and desperate. If you can flip this around, you'll get many members to join your alliance.