If you are like most, there will be a lot of "firsts" when it comes to making your own decisions. You decide whether to go to class or not, whether to wake up or not, whether to party or not, whether to put the extra work in, whether to study sufficiently, whether to have a positive approach to things, whether to make right choices, etc., etc. Often, given the option for the first time, young men make a lot of the wrong choices. My advice would be to go into this determined to make the right choices and put yourself in a great position to succeed from the beginning and for the rest of your life.
There are usually very good resources at D3's to help assure your success. But you have to choose to use them. Again, make that choice.
And, along the way, you can still have all the fun you could hope for.