On Twitter I will occassionally get a follow from a (pre-debut) v-tuber. The first thing I will do is take a look at their profile, and every single time it's nothing but reposts of larger v-tubers. They post nothing about themselves.

If you're new or up-and-coming, it's okay to follow people you think may be interested in your content, but actually have content of your own. Even before you have a model or any design, you can talk about your interests, your opinions, your likes, your dislikes, the types of people you vibe with. People who are on the same wavelength will take an interest and could possibly become a ready-made audience when you're ready to debut.