Tampon Troubles

I’m very new to this I got my first period in July and I’ve tried tampons twice now with very traumatic experiences and I don’t know what I’m doing wrong? I’ve watched countless videos read tutorials but I just can’t do it. I’m very athletic as I dance literally everyday for at least four hours on my short days and I like to swim so you can see how this is putting a big dent in my life hopefully. It anyone can help please let me know!!!