Nuvaring and IUD

Hello

I’ve just started the nuvaring to test it out. Is it okay if it’s not all the way in. I push it as far as it’ll go but it keeps slipping. It doesnt fall out. As long as it’s in there it works right? Or does it have to stay in place?

I’m thinking if this doesn’t work out to try an iud. The ones I’ve been looking at are skyla and kyleena. Any experiences? Good or bad?

Thanks!