Hello and welcome back @sanasca 
I don’t think the testing and reviewing has changed much since you were last here, but there is a new #testers category, and a new The Great Big Review and Testing Guide with all the up-to-date info in. 
@Ace12345 explained it in detail earlier, but here are the direct links if you still need them.
Add Bio - Preferences/Profile
Add Profile Pic - Preferences/Account
Change to Public - Preferences/Interface (Untick the box next to ‘Hide my public profile and presence features’)