i am new to lucid dreaming and was wondering is it a bad idea to try and relive happy memories such as memories that i have had with a family member that has now passed away, the reason i ask is because i don't want to change my memories in any way and create false memories which is one of the reasons i am not interested in reliving bad memories and trying to make them better.

also are you able to unlock lost memories though lucid dreaming or would these just be false memories?

thanks in advance for the help