I'm planning a project that will let people make list and share them with others. Think, to-do list that the family can view add and remove from. I want it on mobile and also a website. It will have to pull some data from a database. Push notification is also on the project plan. So my question is what should I start with? I want to stick to C# and .NET as much as I can't so I can focus on the project and not on new languages. ASP.Net Core Web App, Xamarin, UWP? I don't want to re-code for every device. This is WAY OUT of my comfort zone, but that's when I do my best, I also expect this to be a long project. More resume builder then anything. Just need to some help figuring out where to start.