I’m on a diet as well, walking is great for burning calories and long term increasing rate of energy, fruits like berries are grate sources of vitamins while also containing a lot of sugar that reacts to your body similarly to processed sugar, so I recommend including some lettuce or bell peppers to eat before the fruits so it lowers glucose/sugar spikes, that way the benefit of walking can be enhanced with the benefit of less glucose/sugar spikes, of course it is completely fine to have fruit, and sweets though. I’m sharing what I learnt from my journey so there’s no pressure or expectation to listen to me, I’m hoping I can help any way I can, have a lovely day☺️