International sign language and pictorial signing. Focus more on "descriptive sign" and not the vocabulary but be aware that you might not sign at all doing that it is about communication and epople used to sign language understand pictures way better than hearing people you can even draw into the air. You can do alot using classifiers. And be aware that alot of sign language words make sense in most countries those which aren't cultural evolved. For example if you wanna find the busstop you could sign a car and you sitting behind the person and then use your indexfinger with a questioning face and most people probably would recognize that. For names use the alphabet but be sure to use the regional names to sign it.