Well you are certainly heard here! Welcome!
I came from Reddit too and I think you will really like this community, it is warm, welcoming, and very conversational! There are, however, many key differences between this community and Reddit. I had to learn the ropes for a while before I got a handle on things so here are a few things that might help you as well:
1. Snaps are awesome! Snaps are Snapzu's unique way of sharing content. It is equivalent, roughly, to a "post" on reddit but it has much more to it than that. Clicking the "submit" button on the top right will start a snap. Here you can add links, text, video, pictures and more to your snap. You can make a post that has everything in it and then you can share it to multiple relevant tribes at once! Go ahead and mess around with it a bit and get a good feel for it, this community is active and loves original content!
2. The down vote is not used like it is on Reddit. Only downvote a post/comment if the content violates the site's rules, is spam, or is not relevant. This is widely observed here and not ignored like it is on other websites, I am hoping all of us Redditors don't mess this up because it has been key to creating a great community here.
3. Please read the FAQ and the Site Rules as they are unique to Snapzu and necessary for you to orient yourself.
Other than that, welcome to Snapzu! Feel free to ask questions or seek help, everyone is very friendly!