Good morning! The hardest thing I found and what I still find a bit odd is to just answer a stranger or join a talk others have but I do it and unlike in real world no one says: hey, why do you interrupt us?
The best thing is to find 3 posts/people of your interest and say something about why it attracted you - critics are not negative and tips are helpful if not to the author to someone else who stops by.
Plenty read but do not comment but it can be learned (in the offline world I hardly speak, here you have to if you want to be noticed.

Feel free to share what you like to share. Don't if it makes you uncomfortable. Private things, personal data, addresses and so on I find not a good idea. The same counts for photos taken of people without their approvement, children, you name it (not allowed in my country and within the EU).

A small tip: keep in mind that everything you do takes SP this includes redeeming your earnings as well. So check once per week {also good to see if you are not hacked).

A great time
@wakeupkitty