Dota 2 match - Crystal Maiden

I'm finally starting to get the hang of these MOBA's that everyone keeps talking about. I never really cared for league of legends due to so many angry players who hate noobs but Dota 2 so far has been a better experience. I am still pretty much a noob but I am learning I guess. One of my favorite characters so far has been crystal maiden. For this match I think I went 15 kills, 3 deaths, and 17 assists. I don't know if that's good or not, but it felt like a good score for a match for me being a new player. Feel free to give me any hints or tips I can improve upon.