Clarke
Do you have a ship? If so, I can send you coordinates. Otherwise, I'll be heading to Naboo shortly in order to test another individual. You can return with me back to Dermos to begin training.
Don't lose hope. Especially if your friend hasn't given in to the Dark Side. Training with a Knight of Ren doesn't necessarily mean your friend has embraced the Dark Side. I'll speak with my friend and see if he would be willing to talk to you. He hasn't made his presence widely known yet, given who he comes to be after his fall to the Dark Side.