I wish I could've done things differently this year

The title says it all, I (19M) wish I could've done things very differently this year. I'm going to end this year with a plethora of mistakes, and I know it's natural for everyone, but I still wish I could've ended this year without a deep feeling of regret. Despite this though, I know things will get better for not only me, but for everyone else who feels the same way. I am optimistic that I and many others will have a prosperous year starting tomorrow, we'll just have to be prepared for our future mistakes ahead. Some will be small, some will be big. But as long as we take accountability for our actions, we'll be okay. People will leave us because of our actions, that's how life works, how matter how much it hurts to see them go. But no matter what, we should always keep our heads up high. May all of us have a wonderful year, and also a better future that'll surpass our past greatly. Take care everyone, and stay safe.