Nuva Ring Questions

Veronica • George Alek Jr 4/08/17💙 Layla Jae 8/16/2018💜 Currently pregnant due in November

How soon after during post partum should I insert it..I'm only 3 weeks and my doctor said it was up to me if I wanted to wait 3 more weeks or put it in already lol and is there any side effects that yall hated using this birth control?