Follow the curriculum in order. Take as long as you need on each challenge to really understand what you’ve done so far. Ask the community for help, advice, or just to be a sounding board as you work through the process. It’s not a magical ability that you either have or lack. It’s a practiced skill.
This reminds me of one of my favorite Dune quotes:
Muad’Dib learned rapidly because his first training was in how to learn. And the first lesson of all was the basic trust that he could learn. It’s shocking to find how many people do not believe they can learn, and how many more believe learning to be difficult.