If you are mature and give valid information about things to members on this website, then you will gradually form a good reputation over time. The coven that you wish to take over must also have inactive leadership, otherwise the priest or priestess will not accept your request to take over their position. Also, if members around the site do not like you, you have a lower chance of being welcomed in to the coven as their leader. Don't be pushy and keep asking for positions also, otherwise it may start to become annoying (especially to the coven members that you wish to take over). I hope this helped and made sense. Good luck and blessed be.