Currently have a part time job, looking to take on an additional internship.

Hello. :)

So as the title states, I have had a part time job that I love for 8 months now. However, I have found an internship that seems like it could be a really good fit for me. According to the listing, it is only during the summer, is close to my home, is in a similar line of work, and isn't much more of a time commitment (my current job is 19 hrs/week; this internship is 15 to 20 hrs/wk). It seems like a great fit for me, especially since I'm a college student and am always on the prowl for a good internship.

However, I do have some questions for situations I might encounter if I do get this internship.

1. It is proper to inform each job about the other job, right? If so, how do I go about it?

2. I read somewhere that it's important to pick a "priority" job and let both jobs know about it. Is this bad advice?

3. Has anyone on here juggled two jobs? How did you do it?

4. Any other advice?

Thanks! :)