Self development is a great field. Also, many people will make content that would keep you addicted to the content since you already feel you're developing something just by consuming such content. Over and over. Happiness already achieved by reading about it, it's difficult to actually act on it instead of just reading/watching about it ;)
Also-also, there's an excellent self-development content creator here on Hive, easy to find — among the highest reputation scores, highest activity, trending often enough I would guess (I don't look at trending — no time for that).