Teach Your Hobby To Others
There are many hobbies which can be invaluable to others. For example, if you love to make decoration articles or if you are a casual pianist, you can earn by teaching your skill to others. There are many modes of teaching which you can follow. You can either conduct person to person classes or prepare a video/webinar of your lesson and upload it on carious digital product marketplaces on the internet.
Sell the Relevant Equipment
In every hobby, there are some equipment/software which are essential. You being a hobbyist will be in touch with all the advancements and improvements in the equipment and would definitely know where to acquire. This ability of your can be monetized. Help people get the best resources at the best rates and earn a living. In case, people need specialized parts for the maintenance of any equipment, you can also help them out.
Speak Up or Write
If you have reached an expert level in your hobby, you can always share your experiences through public speaking and blogging. Every hobby has its follower-ship and the various types of how-to’s and expert perspectives always remain in great demand.
Repair and Maintenance
For those hobbies which need specialized maintenance and use special equipment, you can always generate some money by offering repair and maintenance services.