Hey there Jeanx. I actually used CALD quite a bit when I first started out. Instead of creating my own character, I chose the Second Doctor (the non-evil version of my avatar ). I basically would daydream about having conversations with him as I was falling asleep. Over time, his responses seemed to get more and more independent, as in I wasn’t having to make up what he was saying and some answers took me by surprise.
The next step to CALD would actually be having this DC (or MC as CALDers seem to prefer saying for Mind Character) come to you in a dream and then making you lucid. I never got to that point, but I have met and still meet The Doctor frequently in my LD’s. I kind of let CALD go, but the character development that he got has made him very interesting in dreams.
If you want to try, the best thing to do is to make or pick an MC and to try having those conversations. If at first it’s difficult, writing out a script instead can help, as well as participating in the Character Chats in the playground.
For more explanation and personal experience, check back on the CALD topic. It’s a lot of reading, but a lot of good info.