Sell your soul to Satan, see if he has any answers.
It feels like I spent as much time on the query as I did the novel, LOL. agentqueryconnect.com has lots of info and you get lots of feedback... good or bad or indifferent. Then of course, once sending queries you get the request for a synopsis of one length, then another length... oh, higgly piggly.
Looking over query shark’s stuff is useful. At least to a point.