I am 21 and have never done my taxes. Last year was my first full year of work. I also don't have the funds to pay my taxes yet. What do I do? **Speak as if I were 3**

I am 21 years old and just had my first full year of work last year. I have no idea how to do my taxes or even start. I also do not have the immediate funds to pay my taxes. I feel like I am in a panic now... What do I do?!