Fabric (BS3)

I'm a beginner sewist so am just trying to make a few projects and hone my skills. Mainly looking for fabric pieces that are of usable size (A5 +) and are light to medium weight but other than that I'm not fussy! Cotton / poly cotton is my preference just in terms of being a good beginner material, but I'm going to have to learn to work with other things at some point so would happily take other fabrics!