Hy girlies .. batch 18 girls where are you??

Assalamualaikum.i am new one. I had no knowledge at all about social media managements , I just pay for the course because I want to earn. Now I came to know that right thing and doing it in right way is extremely important. I get it. But i am afraid and confuse at the same time, and I did not add anything in my insta bio. Because I have fear of doing something wrong without knowing all things . I am thinking if I edit my bio or post something than may be I will create a mess for future . Should I wait to end the course for posting or editing any thing ?

Can you guys please help me understand how this app work?