"Will" can be used in different senses; "would" sounds conditional and less certain:
-(hearing a knock on the door) I'll get it.
-The weather will be warm and sunny tomorrow. (weather forecast)
-Tommy will talk back! ( talking about an irritating trait)
-A:I'll lend him my car.
B: I wouldn't do that. (i.e If i were you)
Student or Learner