These are a few steps on how to put yourself into a group. As usual I take no responsibility whatsoever. This decision is up to you.
To put yourself into a group like sudoers type this in the terminal:
usermod -a -G admin<yourusernameherewithoutbrackets>
To put yourself into a primary group, type this into the terminal:
usermod -g www <yourusernameherewithoutbrackets>