Choose wisely! This is really important and we can't stress this enough. If you're lucky your career will be extensive and the artist name will stay with you for a long, long time. Choose something that represent you and your music.
CHOOSE AN ARTIST NAME THAT DOESN'T ALREADY EXIST IN STORES! Google it, check the stores, scan social media platforms. If it already exists, you will run into problems. Make it easy for your fans to find you and your music!
It is up to you, the artist, to select a name that works for you. Using a unique name is a real advantage when it comes to search. It is not enough to try and differentiate it with uppercase or lowercase letters, or with other markings. And Emojis are not allowed.
Even if you are a solo artist you might consider a stage name if your own name is very common or might get confused with someone else's music.
So, keep your artist name unique!