Boily (& anyone else struggling with crochet), my crochet teacher made us start with chunky yarn (Hayfield Bonus Chunky in a pale colour) & 6.5mm hooks. It's much easier to see what you're doing, although yellow will be fine for that.
You'll also find life easier if you have a very thin hook (e.g. 2.5mm) as well, because you'll need to put a hook into a chain or the top of a stitch at some point, & this can be tricky & is much easier with a thin hook which can then pull the yarn back through for you to tranfer onto the normal hook.
If you're trying to do a magic ring from text, it's v. difficult to describe it/read & understand it (I recently tried it & it was impossible from text). It's easier to watch a video & do the same thing. Alternatively, start by making 4 chain & joining that into a circle by putting the hook into the first chain, yarn round hook & pull through both loops on hook. But grab the resulting circle of chains firmly between your L thumb & forefinger & fidget the middle open before you try to put the hook into it to make real stitches. This can be the centre of your granny square. Then a few trebles & chains & you're away!