If you need help creating a portfolio in Blackboard, access the resources listed here.
There is no "one way" to do a portfolio. Make sure you understand what you’ve been asked to do for your portfolio; otherwise direct those questions to your instructor.
There are several ways to get started in the Portfolios area, but the easiest is to go to My PCCC and click Portfolios on the second level of tabs. On that page there are links to help materials such as the Portfolios Libguide. The Handouts on the Libguide provide step by step instructions. You may also wish to visit the Blackboard Help pages on this topic.
If you want to watch a video on how to create portfolios in Blackboard, there are plenty on YouTube; this one isn't a bad place to start.