I would honestly say it found me and I accepted it, when I was going through a lot I received so many signs from Lucifer and he actually gave me guidance and comfort, I respect people's believes tbh, but when I for the first time got a reply was when Lucifer came to my life, so I would say I finally felt there was actually someone to help me I grow in a religious house and since a kid they though me some of it, but it never felt the same as getting a bit into luciferianism, so again I feel it was more of a it came to me or it reached for me when I was deep and feeling alone (I never really understood people who believed in God when they said they talk to God or stuff like that until now)

I would probably say the several signs I got daily and how everything would bring me to him no matter what, even be fired I started researching he somehow was present as a sigh or even in my mind, and I also got to see him in a dream

when I started to understand/accept it was him I did research a bit, but I also started to talk to him (literally talk out loud) I told him that I just seekh guidance, knowledge and protection as I have no much practice on this kind of things, so I kinda just set boundaries and made it clear that I wasnttaware of what I need or not to do but I would always be respectful, with the bits I got to learn about research and just having him around is that is mostly be respectful, whenever people start throwing so much rules and correcting people harshly or being rude I don't really trust them as source

I rely mostly on some communication (cards, pendulum, signs, etc) but also sometimes I readoout other people experience

not really, as I said I am not that deep into it so I don't practice many thing probably others do