First of all the learning curve depends on a lot more than the choice of equipment. Each person will learn at a different rate even if all things are equal. Don't get hung up if someone is picking up things at what you think is faster than you, after all its not a race.
Going it alone is doable BUT your cost, frustration and rebuilding skills will all take a hit and the time to success will be longer.
An instructor helps shorten and steepen the learning curve.
Belonging to a club with multiple instructors can really shorten the learning curve because you may be able to get more flight time in.
Many beginners run to the hobby shop or listen to online advice on which equipment to buy. If there are instructors you might be better off to ask them what they have good success with. They may even be able to steer you to some good used equipment at a substantial savings.
Dennis