Your own logo can be protected by copyright, trademark and patent.
Theoretically, copyright comes into being naturally from the date when the work is finished, but you can also register with the Copyright Bureau at low cost.
A trademark is a sign used to distinguish goods or services and must be combined with related goods. For example, if your logo is used on clothing products, you can apply for trademark registration on clothing products. But if you want to cover all the goods or services, it is impossible for ordinary people, and the cost is relatively high, because there are 45 types of trademarks, and you have to apply for 45 trademarks if you want to cover them.
Generally speaking, your LOGO does not belong to the patent category, unless your LOGO is used for the packaging of industrial products, at which time you can apply for design. But the appearance is mainly to protect the overall packaging, not the LOGO.
Considering the above three protection methods comprehensively, copyright registration has the highest cost performance.