Hello,
I will include several links at the end for you to bookmark. First quarterly estimated tax payments are the same for any self-employment so you are not alone on this. The best way to make your estimated payments would be to create an account at IRS.gov. When you reach the site just type "estimated tax payments" into the search bar and this will take you to the proper steps you need to follow. The reason you should make estimated tax payments quarterly is to avoid the penalty the IRS imposes if you don't. Here are the links and I hope this helps you in your career!
https://turbotax.intuit.com/tax-tips/small-business-taxes/estimated-taxes-how-to-determine-what-to-p...
https://turbotax.intuit.com/tax-tips/self-employment-taxes/a-guide-to-paying-quarterly-taxes/L6p8C53...
https://turbotax.intuit.com/tax-tips/self-employment-taxes/tax-tips-for-real-estate-agents-and-broke...
