Pascale, I faced a similar challenge because I’m from Latin America, where we use “do, re, mi” etc. However, I eventually learned that since so much software stuff is oriented towards the Anglophone letter system I had to suck it up and learned it along with the true notation of the Circle of Fifths and not just the easier Camelot wheel system.
By the way, Google for the composite, colored image that uses **both** the musical notes and the Camelot numbers. Put it in your phone and memorize it while having drinks or watching football (soccer).
I know it’s not as easy as 1-2-3, but it works. The same with an image of the pentagram with both musical note labeling systems.
But there’s more to this.
I’m not truly a trained musician but in the process of learning this, after reading also Yakov’s “Beyond Beatnatching” book, I realized that to take things to the next level a DJ should learn at least a little bit of music theory because it will help you get a better grasp of why some keys work better with some and not with others depending on the major/minor thing, the music genre, and the mood and energy of a song, for example.
I didn’t spend a ton of money learning this. I just downloaded some music theory apps on my iPad (Musicopoulous is the best) and read and did the exercise a little each day for about two months or so since I have a regular job.
Over time it will become like second nature.
Anyone learning to DJ should consider learning this stuff. It reveals amazing secrets and makes doing gigs even more fun.