Hi, welcome to KH.
How many rows have you worked already?
Usually increasing unintentionally comes from having the yarn go over the right needle between sts or at the end of a row when it should go under. Check the free videos at the top of the page and see if you are moving the yarn from back to front correctly.
Cheating is an option. . . . Cheaters never win and winners never cheat, but smart knitters who want to retain an iota of sanity do, cheerfully. ~~Kory Stamper