Liking models is easy once you know where to find the button. It is on top of each 3D model on the top right corner. You can like their pages and models by clicking that button on their models. On the bottom right corner you can also FB, Twitter or Google + Share models of artists you like.
As far as the info regarding who likes your models, who bought your models etc... I am not sure how to access that info yet either... it is quite hidden.