Check out Brennan Barnard’s great article:
He has some of the same resources that I recommend. A few books:
The Fiske Guide to Colleges
Ethan Sawyer’s College Essay Essentials: https://www.collegeessayguy.com/book
Ron Lieber’s The Price You Pay for College https://ronlieber.com/books/the-price-you-pay-for-college/
Brennan Barnard and Rick Clark’s The Truth About College Admissions. https://www.press.jhu.edu/books/title/12249/truth-about-college-admission
Frank Bruni’s Where You Go Is Not Who You’ll Be https://frankbruni.com/books
Jeff Selingo’s Who Gets in and Why? https://jeffselingo.com/books/who-gets-in-and-why/
And a few websites:
College Navigator https://nces.ed.gov/collegenavigator/
College Scorecard https://collegescorecard.ed.gov/
Federal Student Aid https://studentaid.gov/
Finaid https://finaid.org/
Big Future https://bigfuture.collegeboard.org/
College Guidance Network (Brennan Barnard is a part of this.). https://www.collegeguidancenetwork.com/
For details, read the article!