I honestly just ate less and made small changes every few days. I ate a lot of Mcdonalds McChickens so I just started asking for no mayo at first.
Then I walked at least 10 minutes a day.
Did anything small that helps a lot more than you think. I go by the "something done is better than nothing done."
Now I walk over an hour at least every day and go to the gym occasionally, rarely eat fastfood, and set a small goal of the day that is easily achievable.
This might not make sense but when I walk I tell myself I'm only going to walk for 15 minutes. 15 minutes passes and I just keep adding more and more saying I can keep doing more. By the end of it I walk an hour so I tell myself I did 400% of my daily goal.
Small stuff adds up after a while, I barely feel like I've changed but compared to the me of last year I'm a whole different person.