I think when a new user enter need as first thing to change the avatar very easy. So this should have priority

You need to use wpforo_get_account_fields hook (the hook is in the class-members.php file in /wp-content/plugins/wpforo/wpf-includes/ folder). You need to write a function in your current active theme function.php file, that will display the avatars field ($this->fields)  before the other fields. 

Also, check out wpForo – User Custom Fields paid addon, that allows to manage default profile fields and add new custom profile fields.

I would like to set first page of Profile with Account Information Page

wpForo menu is a regular WordPress menu. You can simply change the position of the menu items. 

More info here:

https://wpforo.com/docs/root/getting-started/forum-menu/