Don't get fooled into thinking that God has a call on your life for ministry so you must work for the church. I'm in ministry and I don't work at a church. My trash man is in ministry and he doesn't work in a church. Every Tuesday morning the kids rush to meet him in the driveway. Whether we're out there or not he honks the horn.
Most people think this level of worker never completed college or even high school. Whether that's true or not, he'll never know how much his presence every Tuesday morning at 7am means to our family. It's usually the best part of our Tuesday's to see the big truck and someone who cares enough to go the extra mile.
Ministry was never meant to happen inside a building, but rather in the community. Find the work you love and use it as your ministry.