Doing too much at once can mess up your mental state and goal priority.
Once you find that one thing you want to change stay focus on it and try not to think about other things you want to change to.
If anything write a list of changes/goals and pick one that you feel like changing in your current lifestyle.
Here's an example:
I wanted to become Vegan and my post lifestyle consisted of me buying lots of fast food and eating a lot of meat. This helped me because I stopped buying fast food (which I saved lots of money from) and while at home I eat more plant-based foods like nuts, vegetables, fruits, Jamaican Harding Bread, etc...
It's possible!