Do we have to give up something for Lent? I’m 15 if that makes a difference 

I’m not asking this because I don’t want to give up something, I’m asking because I didn’t pick a great thing to give up. So, I decided to give up swearing for Lent (and hopefully after too), but I keep breaking it due to accidentally blurting it out. So, I was thinking it would be better to do something more tangible, like not eating ____, while continuing to try my best with no swearing. Would it be fine to add something on that I’ve eaten once or twice since the start of Lent, or should I just add something I am 100% sure I haven’t eaten/done since Lent started?