That was the very first question I had when I began on my journey, and I want to give my thoughts on the matter.
Make a choice on the technology you want to learn. I would obviously recommend .Net. The community is deep, diverse, and rich.
Next, go get yourself a GitHub account, and learn how to use Git. Look for my posts on Git basics. (If you’re early, they might not be released, but they’re coming soon.)
After that, start concentrating on the basics on your language of choice, and you’ll be well on your way.