Baby sleep training

If you had any experience to train your baby to sleep by themselves, please , please share us your thoughts.

- At what months you start to train your baby?

- Any method?

- Clothes/comfy for the baby/ sleep sacks/ weight sack

- Is the baby crib next to you / different room?

- Are you breastfeeding? pump? Bottle for the baby? How would you manage?

- Any baby monitors/Camera on their cribs?

I seen lots of mommas asks about this but not much responses! If you experience already, please share. IM STRUGGLING at a moment.