Bootstrap is a fine way to create a responsive website. All modern browsers like Chrome, Firefox, Safari, Edge etc
I have never and will NEVER offer paid courses or coaching. I show you how I do things, give you the tools to do it yourself and recommend services. Wordpress is the most important environment I use to build my business.
How often do you test your website performance with GTmetrix or Pingdom? Always remember to keep an eye on your site speed, page size and the total number of request.