Cubenovice
Forever Slow
so do we have to assign 24 places around us to all the 12 edges for journey method.
No, you only need 24 "codes" for all the stickers on the 12 edges. ("images", letters, numbers or whatever you have assigned to each sticker)
The number of places in your journey is unrelated, it is all up to you to decide how many pieces of info you want to store at each location.
This can be 1 cycle, 3 edges, 2 letter-pair images, all edges or corners or full cube (in multi BLD), etc, etc, per location.