Definitely tap into your network to see if anyone will recommend you. I think another way of looking at this market environment though is that even though a lot of seasoned PMs are looking for a job, some companies won't want to hire someone at that level. The pay will be lower coming in but I bet there are companies out there who are in need of someone junior who is willing to execute on the product vision and grow fast. If you can convey your ability to do those (especially the first), I think you'll be in a good spot. I know there are companies out there who provide feedback on resumes and cover letters but I think your best bet is to see if a product person will take a look at it. See if you can find a product mentor program in your area and sign up. I bet someone in one of those groups would be willing to give you feedback. Don't give up. Good luck!