Looking for recommendations!!!

Im pregnant with my second 14 weeks today I have an almost 2 year old who loves to walk everywhere. Is it worth getting a double stroller or is it worth just keeping my single stroller and letting my toddler walk?

I want to be able to still go for walks and to the beach and everything I’m due in may so I’ll have a 2 year old and newborn all summer. Any help is appreciated!