You can comment by going to the end of someone's post and clicking comment. Right under their name at the bottom of the list is an up and down arrow. Click the up part will allow you to upvote and the downward arrow allows you to downvote. Any other questions? I'm new here too, but I'm also really old here in a way. So if I can help feel free to just ask. Hope you like it here, give it time. More people will post and comment. There will be more activity.. it feels slow right now though