Designing web logos obviously isn't for everyone. It will help you quite a bit if you've got some background in graphic design or if you're relatively proficient in design tools like Adobe Photoshop, Adobe Indesign, and Adobe Illustrator or other like products. You don't necessarily have to have a degree in graphic arts, as long as you're able to put together eye-pleasing designs that others will love and pay for. Use Fiverr to find people in need of logos!
Many big businesses are looking for social media influencers to become long-term ambassadors for their brand. This would involve you working closely with one particular band, and promoting their clothes, products, and services. You may also be restricted from promoting other brands, so check out the small print before agreeing to any long-term agreements.
One of the cool things about Google AdSense is that it's so easy to get set up. If you have a blog or website, you can sign up for a free Google AdSense Account. From there, Google will give you a unique code that you will paste onto your website. Google takes it from there, tracking your page views, traffic, and earnings on your behalf. There is no upkeep or maintenance to get this thing going, which makes it a no-brainer if you have a website already.