Pursuing a PhD

I am currently preparing myself for to take the Toelf in two months. The main reason for doing this is because I want to apply to for a PhD in and an English language speaking country. I have to confess that I´m a little nervous becouse because about the test, this will be the first time I take it I have taken this exam. I´ve been reviewing some free materials about it (o dice.. I've been researching about it, but..), but I fell feel this is it's (probably) not enough. My English profeciency proficiency  comes from reading scientific papers, watching movies, and listening to music, so I´d like to go more deeper into the grammar (o.. but I think I need to go deeper into the grammar). If you can help with offer some advices about the test, english grammar, and or conversational practices, I´d be more than happy, of course, I can to help you with Spanish. Thanks a lot.

tu ingles es muy bueno.. tienes suerte con tu exam!