There aren’t that many “great” coaches in the sense they may not do the training you may like or prefer. Your best bet, at first, would probably be to look at the better clubs and get them involved in a wide variety of sports (not just track and field) to develop a lot of skills and interests. There are a fairly high number of successful high school athletes who are/were coached by their parents, so if you cannot find a fit, that is always an option. Not competing for a high school has disadvantages, but could be squashed with high level club and summer track performances.