First, you want a priest who will guide you according to what the Church teaches. Look for a priest who has a reputation for orthodoxy - one who preaches on pro-life issues, sin, the need for the Sacraments, etc.
Next, you want a priest who “gets” you. One who actually listens to what you say instead of taking a keyword and going on autopilot. Trial and error is the way here. You’ll just have to try out various confessors until you find the one right for you.
And, just a word of advice about your parish priest - unless you’ve already confessed to him and found him wanting, do give him a chance. Some stuffy priests are entirely different in Confession.
One way to tell how the priests are is by the length of their Confession lines and how quickly they move. My favorite confessor always has a long line that moves very slowly. That’s because he’s listening carefully to each person and taking all the time necessary to give good, thoughtful advice.
Finally, and most importantly, you need to pray for God to guide you to the priest He has chosen for you. And pray for the priest who hears your Confession. Even if you don’t seem to connect with him, the Holy Spirit still speaks to you through him.
God bless you in your search.
Betsy