Advice is great, but you can’t become a great mountain biker just by buying the right gear. Great riders on $500 Craigslist specials will run circles around amateurs on a $10,000 top of the line bike.
The point is that you can follow in someone’s footsteps, but you have to do the work. You can’t simply pretend to imitate people or their mannerisms or their gear and expect the same results.