We have all been there at this stage of life where you are not sure what you want to take up as a career .
Follow your passion is the most cliche answer .I wouldn't go with that .Most people have responsibilities and don't have the luxury of family money to take care of expenses .
I would rather say make a career in what you are interested in but that would also put sufficient money in your pocket eventually .
You may have passion for something but not the necessary skillset that it takes to make it big in the field of your interest .Not everyone who has passion for music has the talent to make it big .
Identify fields you are interested in .Talk to more and more people and find out more about the career options ,what daily life would be like ,what skills are required ...
Identify your skillset .You may have natural talent for something .You may have potential for something .Some skills esp tech related may be developed in course of time .
If you have passion for something ..It gives you happiness and there is scope to make a living out of it .Thats the best option.
If not, find a career option based on your interests , skills identified .This is developed over time