Hello, one problem, you cannot stop time. Magick is not how its shown on Charmed or whatever but don't worry!(: And about choosing a coven, just take a look at some and read the description and see which one fits you best. Hope this helped!
Well, before you start looking for a coven, I would suggest you search on google images for a profile picture and then write a short description of yourself, practices, and beleifs on your profile bio.
Most covens require a picture and a short description or they will not accept your application. Some exceptions to this would be Spellcasters and Element Magick which will automatically accept your application.
Time itself cannot be altered, however your perception of it can. If your looking to freeze time like in movies, it can't happen. That is done through special effects and is impossible with real magick.
Remember, real magick can not defy the laws of the universe. It is a ritual means of expressing one's will through intention.
I said ONE of the best not the absolute best its only good if you don't want to send an application in and wait there probably are better covens I know there are better covens for other people I meant to say in my other post is its my favorite not every one else's