I would colour clash another bright colour like yellow magenta pink. Otherwise black. If you are wearing it high waisted the top needs to be tucked in. Flat strappy sandals similar to the model, or birkenstock arizonas or madrid, or trainers.
But, if you are really stuck for outfit ideas and have a big tummy, is that style really the one for you? You shouldn't buy something and not be able to see how it could work with your wardrobe or your body shape, or need to buy tops and shoes to make it work.