It can vary A LOT with the type of work and amount of hours. A position with benefits (healthcare, paid vacation and sick time, 401k contribution) sometimes isn't as measurable on your take home pay, but will go far toward the total package to consider.
Sometimes training or vocational programs can get you certified to do more skilled work than the basic entry level job, and without the commitment of bachelor's degree.
Job fairs are great resources to get a lot of industry information at one time for your area. Even if you are still a high school senior, if you are able to attend and meet some hiring managers it will demonstrate your initiative as well as prepare you with information.
Immediately outside of high school I started working in public safety as 911 operator and made 42,000 thousand within my first year. So it definitely doable but you have to put yourself out there and hunt for opportunity . I suggest checking your local county job postings or any major business in your area. However do not be afraid of rejection because the truth is your probably going to see a lot of it regardless of your skill set and qualifications. My best piece of advice is that you need to remember the road to success is paved in past failures.
The average starting pay for entry-level work without a degree is about $28,000 a year. However, I would recommend to research due to the compensation can vary by each field and state. That way, when you start receiving offers, you'll know how your offer stacks up against other in the field