A little advice please?

Nevi • Hey there! My name is Nevi, and I'm here mostly to track myself but meet new friends who can relate to being a lady!
So, I've been on the shot for about a year now, but I keep forgetting when to get it again. I've been thinking of switching to the IUD but I don't know enough about it. Like, what are the side effects and I know it varies, but I just wanna know how it's like from the people who do have it.