CW: religion, specifically American evangelical Christianity. If this advice helps you, cool, if it upsets you, I invite you to scroll on and forget about this post. Choose your battles friends.
If you are a former fundamentalist Christian or evangelical Christian (I'm American, that's my context here), and are now a practicing witch/wizard/spiritualist/what have you, please don't deny yourself the easy mental steps given to you by your former religion.
I've been thru my "all Christians are hateful bigots" phase, and the Jesus Fandom sucks in general, BUT:
The texts themselves are still powerful magicks.
The power of habit is the root of most rituals, which can seem counterintuitive, but I promise it makes sense when you think about the power of daily sanctification of oneself or one's home etc (ex: prayers for health, prayers for safe home)
Even if you don't believe the same things you used to, don't doubt the power in deep rooted beliefs, no matter how much you feel the urge to "burn them all the way down to your core so you are no longer tainted by shitty religious bigotry"-personal experience that one.
All that to say: whenever I feel I have killed an old version of myself, I tend to give myself a subconscious timer for processing my death before engaging in an enthusiastic rebirth. Not because of old guilt trips or other related emotional abuses i flicted by churches, but bcuz even as a spiritual wizard, there is comfort for me when embracing the familiar time frame of 3 days for personal processing and spiritual rest. I used to fight it, the natural inclination to follow old patterns of church, but in all honesty, I was sanctifying those patterns to a new belief, not dragging down my new beliefs with old and often harmful patterns.
The reason the phoenix burns before rising from its OWN ashes is bcuz the phoenix is a symbol of rebirth and renewal, not a symbol of killing and replacing with another being. Butterflies do something similar in that caterpillars turn into goo, then into a flying insect associated with the afterlife and with death and rebirth.
You don't have to destroy beyond recognition what hurt you, you're allowed to repurpose what you can. You can turn that sword into a scythe for harvests. You can beat that shield into a bowl shape and use it to hold all the apples you picked from your tree in your new home.
Don't throw yourself away just bcuz you don't like what somebody else forced you to be.