Baby travel systems

I’ve been struggling to pick a baby carrier and travel system. I want one that the carrier can connect to the stroller and where they are sold together.

I’ve also been struggling to decide between an infant carrier that can be used for two years and then buy a new one , or if I should buy the 5 in 1 that goes through each size. I want the safest option.

Please comment your recommendations, thank you! And please comment ones I should avoid!❤️ also if you recommended a certain time to actually buy it (like which month or trimester)