Not sure if you mean get attention for new fans or current fans, but I’ll assume it’s to get new fans. Make either really good music that people naturally want to share. Generate some controversy, intentionally or unintentionally (Lil Nas X, Hobo Johnson, Rich Brian, Post Malone). Create something unique and different that goes viral. Pay to get exposure from influencers or placement in popular playlists. Trolling by doing something extreme (not advised).

That’s basically your options. Everyone wants things to happen quickly, but most don’t want to put the time, energy and money to being a successful artist. At the end of the day, you’re still going to need to make a “good” song. Unless you become super famous for something totally not related to music then use that platform and audience to make music. An example is Bhad Bhabie who became famous for saying the catchphrase “cash me outside, how ’bout dat” on Dr Phil.