This is one of the most common asked questions out there. Everybody has tried growing organically, but only few managed to do it successfully.
First of all, keep a schedule. Post new TikTok videos regularly, never miss a day of posting.
Secondly, content is king. You should always prioritize high quality videos over the quantity of videos you upload. Make sure that you upload only quality content, then you will certainly get more comments on your TikTok videos.