Yup. https://git.duniter.org/websites/website_en
The main difference is the WOT. But in terms of pure monetary transactions, it is quite similar to other blockchains. Developing a proper explorer shouldn’t be a big deal. It just needs to be done. But so far we do have 3 tools (cesium, sakia, silkaj) that enable us to explore accounts, transactions and show blocks, we didn’t really find the need to develop a standalone BE.
You can see it in real time on https://g1.duniter.fr/#/app/currency/lg
It is currently (and for the next 6 months) 1 DU = 10.07 Ğ1
The thing is that it would probably be possible to have a consensus algorithm that would select the next candidate node(s) that would emit a block, without needing POW at all, in a form of Proof of Authority (since only members can create new blocks). We do use a mix of POW and POA right now since only members create blocks and there is an automatic rotation of members who create blocks, but we could probably get rid of POW altogether. We couldn’t totally figure it out yet. Can you understand French? If so, you can read https://forum.duniter.org/t/abandonner-la-preuve-de-travail-grace-a-la-toile-de-confiance/3077 if not you’ll have to stick to my explanation which I hope is already enough. 
Duniter doesn’t know. The people who certify you will know. This is 100% human-centric. If you do live in Brazil, then maybe your best bet is to get to know the core of Duniter and start your own test currency for a start with people you know around you.
Exactly.