Stroller question please help!

I live in canada and will be giving birth late august/early september. That being said it won’t be long until the cold creeps up and snow starts to fall, which means I will likely not be using my stroller much until next year when spring comes (around April/May). Would it still be worth it to purchase a bassinet attachment for my stroller? What do babies ride with as of ~8months of age? Still the bassinet? Car seat? Regular stroller seat? Help! I’m so lost!