Starting first job out of college as a full stack developer. Any advice?

You have been hired to solve problems, so do that. Writing code is usually how, but not always. Try to understand the “why” to the problems you have been given. Ask questions. Be upfront and communicate clearly. Things will go wrong but try your best. And when they do, communicate it. Always keep learning.

Be hungry to learn, be passionate, communicate well but do not hesitate to ask questions. Give it your best shot and don't leave behind any regrets. Don't let any failures let you down, they are part of the process of learning.