Travel with 6 months old

Hello ladies!

I have to travel with a 6 months old on a long haul connecting flight. It's just me and my baby. I'm struggling with what to pack and what not to pack, and how to manage with hand luggage. Your experiences and suggestions are welcome.

Also what's it like at the security?

I breastfeed, but have started solids too.

I'm going for 7 weeks.