Hahah I'm struggling with the same problem!
And I've had this conversation before but my tips would be this: We have a lot of options at hand to get comfortable without posting anything on your built up platform. You can start creating, whether that is writing, videos, photos or whatever for yourself at first.... You also have the option to create a small (closed) group of trusted friends where you guys experiment together (so only the group sees the content), also the internet gives you enough "segmented" platforms where you can create without the same pressure (e.g. My Hive following is not even near my IG, FB or LinkedIn)... All of these give you the option to increase your skills, to get comfortable and become confident! (without having to be perfect)

On a sidenote is Hive account@jilljoyl81 back? 👀😃 #askingforafriend