Questions & Niche

My fiancé and I want to start an online business so we have freedom over our time and to be able to travel. We have been brainstorming ideas based off of our passions which include being in the outdoors/environment, faith, connection (less social media), living simply, and eating healthy. We have been trying to narrow these passions down to a specific niche and find our target market. We think a target market could be young adult professional couples without children. We really want to have a niche with individuals who love the environment. We don’t want to necessarily be life coaches, so how could we add value to our target market?