Some people may come into working at home accidentally, because a hobby grew into something more, and still others may have to make a deliberate effort to achieve that. What kind of hobby may lend itself to becoming your employment, and how might this happen?
The truth is that a good number of hobbies could be used to create income, and anything that leads to an end product would be a good candidate. If you like knitting or crochet, you can make blankets and clothing for sale, and could consider custom orders rather than just making what you think will sell. Sewing too produces similar end products, and these hobbies seem to be well suited to the baby and children's clothing markets.
Talented artists or photographers could produce portraits, and as your confidence increases you may consider expanding into wedding photography, or other important, one off events. If you have an affinity for the computer then becoming an expert with a program such as Photoshop can open the way for you to selling photo collages, or creating custom invitations or stationary for people. Scrapbooking too can be done on the computer or using paper, die casts and other materials.
Computer enthusiasts may consider learning a specific skill, and use that to help others. You may have a talent for fixing computers, or may be good at building websites and both these and other skills are marketable. There are many people who need help with computer maintenance, troubleshooting and upgrades and if you have the ability to do that then you can sell your skills in the local area.
If you do not have a hobby that leads to an end product, then an area you might want to consider would be tutoring. Anything that you are good at you may be able to teach to another person. All you need is to have the skill and enthusiasm yourself, along with the patience to teach another person. That person may not pick up your beloved hobby as fast as you may like, but maintaining patience with them is essential if you wish to retain them as a client.
How does a hobby become your job? When you are particularly fond of a hobby you may just participate too much to provide for your own needs. By selling the excess things that you make you not only recover the money spent on materials but you can earn some for the efforts that you put into it. This may increase over time to the point that you consider doing it as your primary source of income, and if it didn't happen by itself this is a course that you can choose to follow.
The only real thing that could hold you back from doing this is if you are really not very good at whatever it is that you like to do, as a good level of skill is needed to make your goods or services worth selling. Even then, if you are willing to put in the time to learn and get better, there is the chance that you could turn your hobby into a business.