Having different words for different concepts is great, but creating a new vocabulary will not be enough. There needs to be some training to make people use the words correctly. Otherwise they will just use the new words incorrectly.

Yes, a language is more than just vocabulary.

Getting enough training will be especially important for a conlang

Duolingo style training could file that role well.

Apart from that the quality of the textbook for the a conlang is vitally important for it. It has to showcase the features of the new language.