How serious are you about learning Spanish?
One of the first things you will learn is the futility of “I am going to learn it in X months.” Try not to assign an unrealistic deadline (you don’t know what you don’t know), enjoy the long hike.
Think of Duolingo as, at best, riding a scooter or tricycle, if your goal is to ride a bicycle for a century (competency).
Check out iTalki. You can find hundreds of teachers for real live practice at reasonable rates. If you don’t click with a particular teacher, there are so many others to find a match with your schedule, learning style, and personality.
Buena suerte!