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Heh... until looking up 'vtuber' after reading this (all the while thinking "surely that must be a typo"...), I'd not even heard of it.... :-)
If you're not good at 3D modelling, you'll want to pay to make sure your thoughtful character design is rigged up well.
https://www.youtube.com/channel/UCKK2aWPT74cEO4lHCnLNCoQ
What are your skills ?