Hello yunagi_1416!
Welcome to the Unreal Engine Community! We see that this is your first time posting to our forums! 
Your English reads very well!
We are SO excited to have you as an important part of our growing community! I am sorry that you are having issues with your character not moving. One of the greatest things about sharing your question is that there may be other members who have experienced the same thing as you! I found a link here and here for you to check out. I hope this leads you in the right direction! Please let us know if this helps! There are no strangers here! 
Also, including a screenshot or a video of what is happening may help determine what exactly is going wrong.