Will i be able to win this fight?!?

Everyone has a chance to win anything. Nothing is impossible to win in trust me. Dont matter about his size amount of training or anything you have a chance to win. But also know you have a chance to lose too. Just keep calm and be cautious and use what you know to your advantage. Bigger guys usually mean slower strikes but heavier ground fighting. Stay up and fight using punches kicks elbows ect... Watch his every move. And lastly make sure he throws the first punch so its self defence and so you wont get in as much trouble.