In the long run you’ll probably want to look into behaviour trees. There’s a few good tutorials around the web and on youtube.
In the short term for testing you can use the ‘AI move to’ node in Blueprint to tell an AI to move to a particular location.
The navigation component will make the AI follow a path that’s direct as possible to the next point so how smooth it will be will depend on how many points you use. Your only approximating a curve really. If you really want it to be smooth you should switch to using splines as soon as the bug is fixed.