I have the same interest at you. I shot mostly Food and Street for Instagram purpose. Current setup is Sony A6000+Sony Zeiss 24/1.8 as main rig and Sony 50/1.8 for telephoto. Would suggest u to get a Sony a6000 body and maybe a Sigma 30/1.4 as starter. 30mm is a good focal length for taking food. But u might need to stand on a chair to get a wide flat lays. But prime does excel compared to zoom or kits lens due to its nicer bokeh which will makes the food to looks more outstanding.