The worst thing that can happen is if the last social network that you check is unavailable.
Watch popular content from the following creators.
Try to Be Relevant to your niche.
Keep the SEO Factor in Mind.
As the famous saying goes First Impression is the Best Impression you can create a great impact on the Viewers with just your username.
You should pick an appropriate username for yourself, so it will be easy for people to remember.
If you do so, people may try to guess your username and steal it.
This is a perfect time to use a unique name for tiktok.