Can I already earn tokens giving hosting space?
If so, where can i find a tutorial?
No, not yet. We have to wait for Farming and Safecoin to be implemented.
First focus is TEST 20. The SAFE Browser with Authenticater and Mutable Data support. In other words: A browser which connects you to the network so you can upload (and later change) data. We should also see the first coins (not Safecoin though) moving between users. Not to forget the APIs for external devs to finally start the ecosystem with Apps etc. If this all works well it becomes Alpha 2 as official release, but expect some bugs in TEST 20 before we get there. So maybe we'll see TEST 20b first, who knows.
Currently half of the team is already working on Alpha 3. That one has support for datachains (part 1) and brings us Vaults from home again. In this case though, the whole process of a new Vaults joining the network is more secured in some sort of parallel hash table.
After Alpha 3 they probably start on Farming and Safecoin implementation. But before that's officially released we're in 2018. Not a big deal IMO. MaidSafe really likes to test their stuff and from the moment Alpha 3 is live (with Vaults from home) we could scale to millions of nodes without a problem. There is work on several different coin/wallet implementation so the SAFE network will probably be the first project which has alt_coins before it has the official coin implemented
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Here's a post by David Irvine, the inventor and CEO of MaidSafe:
https://safenetforum.org/t/eli5-of-state-of-progress/14001/2