I am creating a portfolio of design works, which illustrates how each project is made from start to finish. On each project's pages, there are graphic to guide people to read from left to right with a title for each step. There are also a short descriptions about 2-4 sentences accompany the titles.
Here is where I have my question. I know it is grammatically right to use 'I' and write this process in past tense but, it sounds less beautiful and long. I tried start the sentence with V-ing but then feels like it is grammatically wrong. Because this process has already happened in the past, may be I should put past tense but start sentences with V-ed sounds weird to me. As a portfolio of design work, I think it should be short and does not sound like "I'm" telling a story.
For example: (Conceptualization Step)
Explored possibilities to form a model using different materials and methods. Collected data from various research and made a conclusion of a prototype with team members.