Financial aid can come in a wide variety of formats (scholarships, grants, loans, and book advances are all examples of financial aid), with different requirements or terms to receive them. A common first step, however, is completing a FAFSA form if you haven't already done so for the year.
The Financial Aid office can help you find resources available to you and give you recommendations for applying, and you can contact them by phone, email, or live chat.
You can access the chat through their website, or as one of the options in myLoneStar:

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