The skill set requirements vary depending on the type of job. For example if you are a carpenter you might need to know measure and cut and fit the timber or flywood properly to make a chair or table. Similarly if you are an engineer you are expected to have the domain knowledge so that you can perform day to day job. If you are a software developer you would be required to learn coding languages like C, C++, python or Java. So first decide on your interests, then search for the required skill set, gain the skills which will help you choose the right career path.
All the best!