I say, use tiktok. Try creating your own tiktok page and put your music out there. Pay some micro-influencers in the rock music type industry and ask them to use your songs. Use instagram stories and reels. Just make video content using your music. Paid advertising wouldn’t be the best suit for your niche. Try organic engagement on Instagram. Join rock music communities on facebook, reddit and any platform you can find and post entertaining clips of your music or your chorus and stuff. Just don’t spam.