I realize this is your second quilt so if your comfort zone is with straight stitching, then I would stitch a 1" to 1.5" echoing the 90 degree in the triangles with matching thread. I would use white thread on the white and what ever color looks best in the check. I would also STID around all the squares in the quilt. When you feel confident, then it will be time for you to attempt some free motion quilting. Good Luck!!