Two years ago I started on my journey with Sketch. I've spent my entire career using Adobe Design Tools, so switching to a new tool wasn't easy for me. There have been countless articles written why "Sketch is better than Photoshop" and vice versa. Many designers thought it would simply disappear - but there's a reason for Sketch's staying power. It is simple and intuitive. It's got a minimal learning curve if you're familiar with Adobe Illustrator.
If you've been resisting, now's the time to jump on board. The best way to learn is by doing.