To find job openings, I recommend that you search the website Indeed. Enter terms for a job title and add a zip code. One you save your search you can set up an email agent that will send you daily updates.
Next, set up a linkedin profile, and build your contact list. You can use your contacts to help you learn about job opportunities or make an introduction for you at a potential place of employment.
The library has lots of books on resume writing, cover letters, interviewing skills, and other career topics. Search the library catalog using the term career guidance.
Lastly, Wentworth Career Services is a great place to check out and see what they can offer you. It's located in Wentworth Hall.