Just because you made a 'to do' list it doesn't mean that you have to 'do' it all at once, no matter how much you want to. Try to reign it in a little and actually enjoy yourself rather than indulging in some manic, whirlwind of activities that can only realistically end with you holed up in bed suffering from exhaustion a couple of months down the line.
I know it's all new and scary and exciting and that once you get to a certain age, when you have more birthdays behind you than potentially ahead of you, it's tempting to make the most of every second of every minute, of every hour.... But do try to take a moment or two out of your jam-packed schedule to savour these new experiences. You'll get far more pleasure out of it if you do.