You can learn ASP.NET at https://www.howtoasp.net/tutorials/asp-net-tutorials/. You can learn the basics of ASP.NET first, then to watch some videos, you can also try some quick examples.
To learn more about data-access in ASP.NET you could visit https://www.howtoasp.net/tutorials/database-tutorials/. This is an important part of learning ASP.NET.
You could also read some of the best ASP.NET books at https://www.howtoasp.net/asp-net-books/.