For Achieving the Alibaba Cloud Specialty Certification, firstly you have to buy the Accreditation Paths package that you wanna achieve here: Specialty Certification. Then, complete the course that will available on your courses menu in your Alibaba Cloud Academy account after you purchased it. You can make a note for every topic if needed, you can also try to search to the alibaba cloud documentation about the related product that you are learning from the course. If you are ready take the exam by clicking the exam button that available on the related course page as the figure below.
Make sure that you should start the exam after you feel ready to take the exam because my experience was that I have to purchased the Accreditation Paths package again to retake the exam for 3rd attempt as shown in the figure below.