Yes, you can just sew them together. Make 2 pairs. Line up the seams and sew those. We call this a 4 patch. One thing that is different about quilters is that we usually use 1/4" seam allowances. you won't get much of a quilt from a 4 patch. fortunately, you can extend that with pieces from old clothing, stuff from Salvation Army stores, etc. If you look at what people post here, you will find lots of inspiration. for patterns, there are many sites, including
www.quilterscache.com. Early quilters did all their sewing by hand. You can too.