You don’t need to make it so hard for yourself. Another reason for procrastinating is fear of failure. However in this case, Lucifer is one of those who always comes, whether you have opened your astral senses to sense him or not, he will be there, so don’t worry about that.
You don’t even need a sigil - Lucifer knows his name is probably waiting for you to get in touch.
Go with whichever one you personally feel drawn to using the most.
I got grimorum verum, after I already met Lucifer, and still use the ‘asian’ symbol. I do feel the sigils have different energy, but I haven’t opened the GV version to check who’s behind it yet. To a certain extent, most of us have such mixed dna and spirtual ancestry from all over I don’t really see the use in being territorial about it - unless the spirits were so, and this one isn’t.