Let’s get some basics down. First, you don’t NEED to know what salvia is like. This is a want, not a need. Second, be very sure that you aren’t wanting to get high because you are self-medicating, which is why a lot of people get high (whether they realize it or not is another story). If this is the case, you are opening the door to some serious issues with your mental health.
If you have had ANY mental health issues, do NOT smoke salvia. The dysphoria and hallucenogenic properties can push you toward a psychotic episode or break. As evidence of this, you’ve been given two answers from people who have tried this, and half of them said it was not all good.