Hi
@Alexfuster and welcome
First of all - the competition for getting into GSoC here is very hard (we have many students applying for relatively few spots) you might want to consider applications at other organizations for this year's summer of code. Moreover, the proposal draft phase has already started, so you should hurry up and get your hands on the code. We have a
quick start guide for setting up your local copy of Terasology and running from source. Make sure to ask questions here or on our IRC channel if you run into any problems.
If GSoC is not that important for you we would like to welcome you as a contributor here anyways. There are some bounties on our GitHub issues. To get started, have a look at the
contributor friendly issues.