let it be known at church that you want to learn to quilt and sew. If your church is anything like ours, some kind older person will have a sewing machine that they aren't using. i have several since i have 5 daughters and i bought used ones at Thrift stores and sewing machine stores for them. Your grandma's foot pedal machine if she has one, works great for quilts. i went out and found one just to have something when the power is out.
now i wouldn't give up any of my machines unless i knew the person was serious, so be prepared to learn that someone might want to have you come by their home to learn to test out your commitment. i started young and did things by hand. Learning how to keep small regular stitches for hand piecing helps when it comes to small stitches for quilting as well. Start with a pot holder or more fun, a cell phone case or laptop case. You can find patterns free online for those.