I am going to be rather cruel and honest here, because I feel like everyone is trying their best to sugarcoat it all and not discourage you from creating videos. But I want you to know this is just honest criticism to help you make your videos better. You've got to make some major improvements if you're planning on taking this seriously. You have black bars on your videos, no definitive branding, no intro and the audio quality is mediocre to say the best. These are things that will need to be improved if you want to see any kind of major growth on your channel.
Now I understand that you enjoy making your videos and you have a lot of fun with them, but right now what are you doing that is different from every other Minecraft channel on YouTube? Nothing. You've gotta start bring your own flare to this dude, you need to start trying new things and spending a lot of time brainstorming ideas to make your content better.
I wish you the best in all of this, and as an answer to your question, it's different for everyone. Some people it can take a week (A day is unrealistic for anyone), a month or even 5 years. There is no way to speed up the process and there sure as s**t isn't a shortcut to an easy following. You've gotta work hard and keep focused. <3
EDIT: I'm not saying you need to go out and spend hundreds of dollars right now, but it's something to keep in mind if you plan to take this all seriously bud. Best of luck with your channel, I'll be watching to stalk your progress.

<3