finished my first tapestry crochet wondering how to block it

hi all! i finished my first tapestry crochet, it’s a bit smaller than i thought it would be, i was hoping it would be blanket sized but it’s not, still debating adding a fleece backing and was wondering what other people did with odd sized pieces like this?? also wondering how i should go about blocking something like this to make it a little bit more even and lay a bit more flat.. i only have a small blocker for granny squares. its 132 stitches across and 200 rows, its made with caron one pound yarn 100% acrylic yarn. thanks!