Question normal

Hello everyone...I am a sixth year student of medicine in Colombia at the technological University of Pereira and I would like to get ready to obtain a residence in England.
What kind of English tests are required?
What are the requirements that the government requires to give a student visa?
What are the homologation mechanisms that they demand?
Is there a scholarship for residencies?
Those are some of the questions I have, but if someone has some kind of experience or knows something about the subject. Any information would be very valuable to me. Thank very much for your comments