While I have not recruited specifically for makeup artists, I have found that the best way to find out about any career is to go online and ask. There is information out there that will tell you what people do in certain careers, other sites that might describe a typical day in the role, jobsites with openings and job descriptions as well as salary ranges for the positions, etc. YouTube may have videos explaining the same. If you look at multiple sites, look for consistencies in what they say. This should help you feel more comfortable that the information you are reading is accurate.
I used Google and typed in your question. Here is what I found so far to get you started.
Hope this helps. Feel free to reach back out.
How To Become A Makeup Artist | Career & Salary Information
What salaries do makeup artists typically earn? What salary can a professional makeup artist earn? According to the Bureau of Labor Statistics May 2016, a makeup artist salary can range from $22,630 to $124,960 depending on location, level of experience, specialization, industry and quality of portfolios.
Makeup Artist Annual Salary ($37,239 Avg | Dec 2018) - ZipRecruiter
How much do Makeup Artist jobs pay a year? The average annual pay for a Makeup Artist Job in the US is $37239 a year.
Carol recommends the following next steps:
MAC makeup Artists make on average ($18-$20)
Sephora is a little lower than all the above and no commission on sales but tons of free product/ gratis.
Freelancing for specific brands (For example, DIOR, SMASHBOX, NARS, etc..) is where you make the highest amount working for someone: usually $18-$25 per hour
If you work for yourself and start your own freelance business, it can be very lucrative if you have tons of clients. Typically people charge anywhere from $75+ for a makeover (thus making $75 per hour). This is very hard to do though because you have to build all your clientele first.
This is all from personal experience, and in Canadian dollars.