Tampons and Diva Cups

Okay, I’m wearing a tampon for the first time in about 5 years, I’m not sure if I’m doing it right. I can feel it at my ‘entrance’ and I’m scared. I have always been a pad girl and I am starting to get tired of the mess, I want to try wearing tampons or diva cups but I’m scared and nervous, how will I know it won’t get stuck up there? All I’ve ever tried or was interested in was pads. Please can you guys give me some advice? Please don’t make fun of me. I’m just afraid of TSS (toxic shock syndrome).