Hi, What should be maximum words that we can write in the proposal? Because Previously, I have heard that If proposal is too long, then hirer doesn't read the full proposal.

Hey Everyone, I have a simple question. I have been working in Business Development for about 3+ years and now I want to start freelancing on Upwork but the problem is that I don't have much proof to show for my experience. I just have proof of list of leads that I extracted from LinkedIn to google sheets. Would that be enough to showcase on my portfolio on Upwork? Thanks.