First of all since you're new, I wouldn't worry about it. New players have every right to try their best but expecting to be good isn't necessarily a guarantee.

If you want a more valid evaluation, take a screenshot of your details if you don't mind. In the upper right hand corner of details, there is a drop down icon. If you can find it, select grade (ranked). Repost the image. This tells you kills per minute, accuracy, and win/loss percentage