Hi Felecia, welcome to the community! Have you checked out the sba.gov website? They have tutorials there for business plans.
We also have many previous discussions/articles along with our business module that you could view to give you more information.
sba.com has excellent resources to help writing business plan. You should also look at business plans others have written to get good understanding of what is involved in writing a business plan and the content. Look at this link to get a detailed sample business plan you can study -