Project not building

It depends on what you want to do with OpenMRS? Do you just want to contribute? Are supporting an implementation? Or something else?

I want to contribute to the project as a developer.

Can you take a look at this?

I have gone through this, but I might have not clearly understood the difference between what openmrs-sdk and openmrs-core provide. From where I can get this cleared.

Did you get a chance to go through this?

Yes I have, i have installed the sdk, thank you. Can you please guide me how should I go if I want to apply for GSOC?