Going to a regional doesn't guarantee anything. It may give you a better chance but no one really knows and understands the HR algorithm. It does seem you need to check as many boxes as possible. So going to a regional, upgrading fast, become a check airman, chief pilot, ground instructors or anything else to set you apart will give you the best shot. Best case you are still at least 5 years out as of now. Lastly choose carefully, do your due diligence and try to make sure your regional of choice will be around long enough for you to get out.