I have to make this opportunity efficient.

These days, I can back home early about 6:00 PM. So, I have a lot of time to do anything. Of course I should study English using this opportunity, but I can't stop youtube. Someone tell me how can I be serious person? I'm really lack of strong mind.

I have to take advantage of this opportunity.

These days, I come home early, about 6:00 PM. 

Of course I should use this opportunity to study English

But I can't get off youtube

Can someone tell me how I can be a disciplined person?

I lack discipline. 

Keep up the English study! Your doing well!

I have to make this opportunity efficient.

These days, I can back home early about 6:00 PM. So, I have a lot of time to do anything. Of course I should study English using this opportunity, but I can't stop youtube. Someone tell me how can I be serious person? I'm really lack of strong mind.

These days , I can be back at home early , about 6.00pm .

So, I have a lot of time to do anything, including studying English, which I should given this opportunity.

But, I just cant stop watching Utube!

Could someone tell me how to be more disciplined?

I really lacked determination.