When I started preparing for salesforce certified mulesoft platform architect exam, I looked at the topics first. There are nine areas, and some of them are big, like governing web APIs on anypoint platform at 17%, designing APIs using system, process, and experience layers at 12%, and monitoring and analyzing application networks also at 12%. I tried to read and understand these on my own but it was hard for me, the language and concepts were confusing. A friend told me to try ITExamsTopics, so I searched for them and found their facebook page first. From there I found their website and installed their web-based software.
In the beginning I just used the free part to see how it works, and it helped me understand the format and how questions are asked. Once I felt I needed more help, I purchased their subscription package for full access. after that things became much easier for me. The domains like architecting and deploying API implementations, deploying API implementations to cloudhub, and establishing organizational and platform foundations all made more sense once I saw them explained step by step. I practiced the smaller topics like explaining application network basics and meeting API quality goals near the end since they were lighter in weight. When I finally sat for the exam, I understood the questions well and passed without much difficulty. If you are also finding these topics hard to understand, I would suggest checking itexamstopics.