IUD / birth control

i am thinking about getting an iud and i just have some questions. if anyone that has had an iud or currently has one can answer some questions that would be great. thank you.

how much do you spot afterwards and how long does that last?

how long did you wait to have sex after you got your iud?

how long did you hurt / have cramps or were sore after?

what advice can you give me to help me prepare for an iud?