What are good high paying jobs for a 19-year-old boy that require no experience and no degrees?
The job market is like any other market where prices (in this case, wages) are determined by supply and demand. The more limited the supply in a particular field the higher the wages will tend to be. So, for example, if a job requires a college degree, it will tend to pay more because there are only a limited number of people with degrees. The total number of college graduates is a subset of the total population looking for employment.
The one potential special qualification mentioned in your question is that you're a young man. If you're healthy and strong that qualifies for you manual labor jobs that other people couldn't do. Some of these pay well, especially the ones that other people don't want to do. For example, garbage collectors make fairly decent money even though it's an unskilled job that requires no experience or education. Not everyone can do it, physically, and not everyone would want to do it.
19 years old is the perfect age to look into working at a power plant. Some teenagers (18 and 19 years old) earn over $70,000 per year as boiler operators. No college degree needed, and some of those teenagers earn more than their parents.
To find more information about power plant jobs in your area, Google: "high paying power plant jobs in my area". Or find out about a "POSS Test" by doing a Google search. A POSS Test is what many power plants use to pre-qualify applicants for specific power plant jobs that do not require a college degree.
Also, do Google search for: "worker shortage at power plants"
If you're not interested in that, military pays you and covers living/eating/clothing/medical expenses, coming to about 35K a year value.
Lastly, fireman or law enforcement may be options. I'm not sure what the pay rate there might be, however.
This is a great way to make a lot of money fast, and in the remaining 6 months of the year do what you wish. I have done this for 7 years. I now have $30K saved and have traveled to over 10 different countries for vacations from 1-5 months long, sailing, scuba diving, backpacking and more!
Other jobs may pay more per year, but you will have to work year round. Especially once you get a few raises and start making $30K or so, you appreciate it is like making $60K/year, but only deciding to work half the year. Also look at jobs with National Parks Service (NPS) and Bureau of Land Management (BLM).
You can also compare this with other answers. Railroad work for the same amount in a year, but working the ENTIRE time? Or the welder who just now after 13 years is making $57,000/yr? Restaurant workers make about $15K/yr and if on the floor about half of that again in tips. Remember that life is for living, and work to live, not the other way around.
The other benefits of wildland firefighting include: Peak physical fitness, travel to amazing wilderness locations with occasional perks like helicopter flights or witnessing towering infernos of 100ft+ flames engulfing hundreds of acres, intense work builds not just body but mind and personal character/discipline. Challenges are frequent, keeping your human spirit sated with satisfying achievements: this is not some "what is the point of my creating another spreadsheet" office cubicle job.