Is archaeology only good as a part-time job?

No, it is a job that requires you to work full-time. You must first conduct a significant amount of fieldwork in the field of archaeology, beginning with your internship and project plan. Then, if you are aiming to become an archeologist, you have to do lots of research on the ground. Traveling may

No, This is a field of interest you can pursue. There are a lot of potential careers in this field you can do in your full time as well.