If you do the dedication ritual from the Joy of Satan website, this counts as your initiation. You are accepted as one of Satan if you do this, and receive his protections as well as his guidance.
It is a commitment one makes for life, but one very much worth it if you put in your efforts to meditate and advance.
For healing, it depends what sort of issues you are dealing with.
Regular Aura cleaning can help alleviate most health issues, but for more serious issues, dedicated healing workings can be done.
Read this page of the JoS and the ones linked at the bottom to learn more:
https://www.satanisgod.org/www.angelfire.com/empire/serpentis666/Healing.html
One last thing about the dedication, it is vital to dedicate first before doing any of the meditations or workings of the JoS website.
The enemy actively seeks out and goes after souls trying to advance, and without protection from the Gods, one is quickly overwhelmed and destroyed by them.
Dedicating to the Gods with the official blood dedication ritual shows ones loyalty to the Gods and also serves as a means to break the enemy spell from your soul.
Every person before they come to the Joy of Satan is influenced by the enemy programs and decay on some levels, this needs to be broken through and then cleaned of to permanently set oneself free from these in order to make any significant advancement.
The dedication ritual is the first step in breaking these. After one has dedicated, they are under the protection of the Gods. Any major enemy curses or negative entities trying to mess with you or influence you are warded of by the Gods for you until you have grown strong enough to stand on your own feet and protect yourself.
Then even after you have learned to protect yourself, you can always ask the Gods for help and protection in cases where you need it, or where you are dealing with things that prove too much for you at the time.
Hail Satan!