My first salvia trip some dick friends let me take a HUGE hit of 35x. I was blown away. Out of this universe, I saw God, and I saw how insignificantly tiny our universe was, there are no words to describe my trip. It was absolutely mind enhancing, and changed my life. I have a pretty positive record with hallucinogens, and I really like being...completely gone. For a first time trip, I would not recommend this. I would start on 5x or 10x, and remember the first time sometimes the effects don't come on. If you are looking for a good mood with light visuals, which I recommend for first trips, this is the method. Then explore how you feel about this and decide if you want to go further.
If you go too far, and you have a bad trip, it can be a very, very, very bad trip. And because you know what you are smoking(I didn't) there's a greater chance you will be nervous about it, like it or not, and that can lead to a bad trip. Try something light, so you know you aren't gonna be too blown away, and you're more likely to have a good trip, and explore from there.