Might I also suggest some things for those that don't want to create a language? Lexember is fairly low pressure since all you have to do is coin one word (possible with etymology or a translation, but those are optional).

An approximately similar level of effort would be making something every week - a short story, drawing, playlist, craft, etc - that relates to language or speaking in some way, or plays off someone's Lexember post.

Some possible prompts:

story, oral tradition, writing, verb, noun, pronoun, preposition, article, conjunction, interjection, numeral, determiner, classifier, particle, adjective, adverb, gerund, copula, sign language, symbol, emoticon or emoji, speech, poem, tone, syntax, lexicon, vocabulary, record, conlang, translation, mother tongue, foreign language, English as a second language, inflection, grammar, contraction, morphology, sounds, phonology, phoneme, lexeme, affix, morpheme, tense, case, voice, mood, aspect, person, gender, animacy, definiteness, conjugation, declension, dead languages, agreement, contrast, singular, plural, paucal, accent, umlaut, idiolect, sound change, vowel, consonant, semi-vowel, fricative, schwa, rhotic, Klingon, Na'vi, Esperanto, Dothraki, language revival, Newspeak, language instinct, Ido, Laadan, Sapir-Whorf, Toki Pona, Quenya, Sindarin, Trigedasleng, Volapuk, Interlingua, language academy