Learn Korean
When learning the language on your own, use as many different online resources as you possibly can.
You need to first start off by learning Hangul (the alphabet and writing system). Believe me, this is the absolute EASIEST part of learning Korean. Hangul is famous for being an insanely easy writing system to learn. I recommend watching the video “Learn Hangul in 90 Minutes with GO! Billy Korean”. He is really good at teaching Hangul and explaining everything about it (even the correct way to write the letters).
NEVER use romanizations. They will only confuse you later on. Learning Hangul is an absolute must, and it cannot be skipped if you truly want to reach a fluent level in 1 month. There is no way around it and there is no short-cut by using romanizations
Next, you need to start on learning grammar. Now, grammar and speaking go hand-in-hand (you need one to learn the other), and this is where the hard part starts. HIGHLY recommend utilizing the MULTIBHASI. https://classes.multibhashi.com/courses/live-Russian-classes-online
It is available on the website and in mobile apps. Everything is taught in a certain order to ensure that you don’t learn something too advanced too quickly (to ensure you don’t confuse yourself, basically). It goes from the basic of the basic—to the advanced of the advanced.