I want to be one of them, studie light aspect of magic. How can I be transformed in such being?What angels actually are? I don’t want to work with angels from kingdoms of flame, because in my experience it’s all demonic thing.
Is angelic initiation exist and who can provide me in new life?
Shouldn’t one know this before deciding to become one, just in case all they are is particles of floating waste or shit or in case they are a parasite and rely on vamping others or in case they require a symbiotic relationship and can’t exist without something else or, or or? In case you don’t like their boss or whoever out then or commands them?
If this is your experience then how do you arrive at this:
I don’t understand how your experience has colored you to assume there are angels in opposition of your experience or why you’d want to become one before you’ve experienced them to see if they were indeed different from what you had experienced before? I’m most saying there isn’t, I just understand how you get from a to b here when your words say you don’t have the experience to know for sure this exists.
A new physical body and life different from the one you are in?
Not that anyone admits to being aware of and everyone else will say no unless you go through the recycle bin again or do the work to make the next life be what you want it to be.
I don’t know personally on this one, but I would assume one should clear up these base questions before pursuing it other than as a curiosity to see if it would be possible.
Who says you’d be a better angel than human? One assumes they have rules to play by and things to answer to, and considering most humans can’t follow basic instructions or take accountability for their actions, I’m not sure if most of us would be suited for the position, particularly since we usually want things to be our way, we rarely care about most of the things angels supposedly do let alone care about others best interests etc etc.
Yes I probably sound absolutely ridiculous and these factors probably aren’t a thing, but I sound no more ridiculous imop than someone wanting to become a light angel when they’ve only experienced demonic angels and they don’t even want to work with angels to determine how they exist or what they are, they just want to be one because… because why?
What do you hope to accomplish by becoming an angel instead of a human being?
This sounds to me like my daughter declaring at 3 years old she was going to marry a pop star because he was hot, now 15 years later she can’t stand that pop star so good thing she couldn’t do what she wanted before she understood what it was.
Good thing for us that we often can’t do what we want when don’t understand it lol 
In my worldview, you already are: It’s my opinion that most of us, if not all, are already higher beings, angels in your nomenclature; we have incarnated as humans and had our memories wiped.
So one way is to remember who you are as an angel is to work on your past life (incarnation) regressions and between incarnation memories. This will also help you avoid reincarnation so that you stay in the higher realms after transitioning out of the body.
Another way to is accept you are as higher being and behave that way in life.
To study the light side of things, you might like to look into the “Lightworker” or “Human Angel” communities. They are also called Earth Angels and Bodhisattvas, depending on who you’re talking to. I really like the work of Steve Rother at Paths 2 Empowerment / Espavo for this and maybe you might feel good with those vibes too. 
You don’t have to be an angel. You can and should pursue being your own god.
You’ll never be an angel unless you advance far enough to be transfigured, like the prophet Enoch supposedly was.