You are new on TikTok and want to build a following? For this it is important that you post very regularly at the beginning. In the first months 1-3 times a day are recommended. This way you show TikTok that you are constantly producing exciting content for your target group.
To find the right posting times, you should consider the profession of your desired target group. Are they students? Then 1 p.m. (lunch break) and 8 p.m. (just before bedtime) might be appropriate. Do they work in a profession where cell phones are not allowed? Then 8 a.m. (before work) and 6 p.m. (after work) might work. In the beginning, this is trial and error. Once you're a few weeks in, you can screen your analytics, see what times your followers are most active and adjust posting times if necessary.
Just as your weekday mobile behavior differs from your weekend behavior, so will your audience’s. On Friday and Saturday, they're likely to be online longer in the evenings than on weekdays. Be sure to take this into account when setting posting times.