Needing opinions on getting a double stroller or if it’s a waste of money!

I am due in January and my son will turn 3 in April, so I will be pushing a 3 year old and an infant around. I am a single mom so I would like to have the option to go on little adventures with my children by myself. Zoo trips or park trips, my son still uses an umbrella stroller with no problems, he’s a little over 30 pounds. I’ve done my research on target and Amazon, I found some, but just curious if I should even consider it and if so, please give me some recommendations. Baby shower is coming up so I need to figure it out soon.