Starting off slow

I think that the best exercises are those I don't need to use weight to work with right now.  I am tempted to go online or to the stores and buy some equipment and some shoes, but right now, I am only motivated to start off slow during my exercise routines.  I do wonder if it will have an effect on how I have been eating lately.  I now realize that buying those trigger foods was not a good idea. Eating too many snacks will do more to throw me off than anything.  Do I counter it with exercise? What should I do?  All I know is that I am now more motivated to exercise and move around than anything.