ok first of all i dont like to see members that have tried to do something and other members then take the P--- out of then for trying,so if you have nothing to say that is constructive then do nor post. Its a nice try for your first render m8 but maybe try to look up a render tut you will find some good ones in the premium tutorials section here on gr,i am sure you will get better and better as you go just keep practising
How do you cut an image and leave white sutff around it?(not an insult acctual quesition) jsut cut your stuff the basic way use a pp;yiognal laso tool