Recent CS grad building a product design portfolio: where do you find flows and case studies, not just pretty screens?

I'm a recent computer science graduate who focuses on the creative side of tech i.e Product design and Front end development for now. I've worked on a few projects for myself and some friends and I'm trying to advance more in Product design and creating a Portfolio for my job hunting journey. I've used a couple of sites so far like Dribbble, Behance, Pinterest and recently Mobbin. Some gives me mood, inspiration but sometimes the design that intrigues me there has no flow or case study that I could use especially Dribbble. I know this requires a lot of research to find something close to perfect to use but it's just getting frustrating. I just want to know how you guys find inspiration for your product designs when you need a flow and if the premium version of these sites are worth it. As well as your experience in this field. Thank you.