Hi Kim!!
I thought the EXACT same thing when I started reading signing books (lol..my lo was so young..a few weeks old). I tried memorizing the signs, but I couldn't "get" it and kept forgetting. Fast forward to when I did start..I started with three..more, all done (which I dropped later and replaced with finished), and milk. Three signs! I could handle that
Now she's getting older and i'm adding more to her vocab..and I know this sounds silly, but signing actually is pretty much signs that you would use anyways! The signs just make sense, ykwim? Airplane...finished...book (two hands together closed and then open like a book!)...cat and dog are not so so obvious but bird is. I'm rambling but with repetition and using as many opportunities as you can it'll be like second nature
