Safe, yes, but if you’re precious about your hymen then you may want to be careful with it it as I would think it’s possible it would tear it a little. So use a small pair and just go slowly. If you’re using tampons though, it’s not much different from inserting them, just a bit rougher.
There are so many myths about the hymen though. Please make sure you educate yourself about it.
If you’re not absolutely sure about how it works, or even if you are, watch this YouTube video. She’s absolutely brilliant.
Let me also encourage everyone to get on friendly terms with their genitals. It’s all part of you, an absolutely amazing, beautiful, sexy part. So get yourself in front of a mirror and check it out! This is a nice guide to all the different bits that talks you through exploring yourself.