If you're wanting to maybe try a resolution (which is really just a goal you want to accomplish or a change you want to make), then there is a principle called the fresh start effect.
Here's the research paper if you want to get into it, but at a very high level: people tend to do better with a clear starting point. Motivation is higher, you have a designated start date to work your plans toward, you can make plans in the meantime without feeling badly about yourself, etc.
The new year makes an obvious starting point, but it's not the only one. Mondays, your birthday, the first of any month, the day after a long weekend or holiday... Heck, you could create a fresh start for yourself in the middle of the day "starting at noon, I will..."
I see this at the gym all the time that class attendance tends to skyrocket on Mondays and dwindle over the week.
It's also why I think and tell people: like, it's fine if your resolution has "failed" already. You can try again. You can try again tomorrow or this afternoon or decide that you want to rethink your strategy or hell, decide if this is even a thing you actually care about, or just something you think you're supposed to care about, in which case, maybe stop putting your effort into it? But if you do want to do it for real, then you haven't failed until you have committed that you failed. You can just look for the next fresh start, dust yourself off, and try again.
If you don't actually want to have a resolution, then ignore all that, lol.