Some churches don't have volunteers for their music. A talented pianist, guitar player, etc. can make pretty good money doing this on the weekends. Most churches offer tryouts on occasion. This idea is pretty easy to get started in that you just need to reach out to your worship pastor or someone in that ministry and let them know you have the talent and some experience. Don't be shy!
If you’re a skilled worker in a specific niche, like marketing, design, or software development, there are specialty marketplaces that cater just to you. These are amazing places to make money online as you know that the people visiting them are looking specifically for the skills you have. Check out places like 99Designs or Dribbble for designers, Cloudpeeps for marketing and SEO professionals, and TopTal, Crew, or Gigster for high-level software developers. Once you've built up your development skills, you can begin building a brand for yourself as a higher-value consultant and start charging brands for larger projects like implementing an entire WordPress security overhaul or migrating a website from http to https.