While a bachelors degree is not usually a requirement for most firefighting roles, some postsecondary education or training is needed to show employers that you are prepared to work safely in your chosen area. It's important to keep in mind that while an entry-level position as a firefighter may not require more than a high school diploma and some certifications, a more specific occupation as a wildland firefighter might encourage coursework or a degree in agriculture, forestry, or outdoor recreation management. Some of this education can be achieved through technical certificates or associate degrees rather than a four-year degree. Education requirements may also depend on the entity that is hiring you: the local, state, or federal level.
Some of my information I collected from the National Wildfire Coordinating Group, and I strongly recommend you visit their website (https://www.nwcg.gov/how-to-become-a-wildland-firefighter) to learn about the steps to become a wildland firefighter. And please explore the rest of the site, too! There's a lot of great stuff!
If you would like some initial on the job training and experience, you can also look into volunteer firefighting. This may be at a county or city level and would not necessarily be centered on wildland firefighting, but it's definitely a starting point!
In short, some post-high school education is probably needed to achieve your goals, but that education can come in different forms - don't be discouraged by thinking that your only option is a four-year degree and the student loan debt that might accompany it!
For more info, see also the Bureau of Labor Statistics' page on Firefighting: https://www.bls.gov/ooh/protective-service/firefighters.htm#tab-3