[Reefersleep]

In my language, there are decent books on the subject and informative and inspiring accounts on Instagram. Look for "baby signing", must be loads of English materials. We created our own extended vocabulary using English baby signing, lots of good words here: https://babysignlanguage.com/dictionary/table/

Like the GP said, helped us loads in communicating with our kid before he could talk, much to our shared delight, and, I believe, relieved a _bunch_ of potential frustration.