It's been my experience that most people, including those experienced, qualified, &/or published, are generally receptive to cold emails within their field(s) of work or interest.<p>My format is typically a ~3 line email: first, I mention how I came across them, which is often "I was reading __ and saw your comment," and usually where I found their contact info. Next, I intersect my work with theirs; in the case of comments, often that is already contextual "you mentioned X and Y, and I'm working on Y and Z." Last, I'll present a simple structure of what I'm trying to learn, how I think they could help, and ask if they're interested. In your case that could read something like "I'm looking for a critical review of my design, because I might have missed something obvious. Would you be interested in helping? I think {small amount of time} would really keep me in the right direction. We could {preferred communication method, like video call} or {alternative communication method, 'or I can email you the design'}"<p>I consistently receive replies from >80% and more than half of those conversations yield incredible value to my efforts. These days, I like to offer some form of compensation in my cold contact, out of respect and for efficiency, but it's not required. Often this gesture is welcomed but unnecessary!<p>Being thoughtful, curious, and organized in your outreach are the key components for this strategy. Best of luck!