I don't know

I'm sick to of talking about only what I know, in this text I'll try writing about things whose I don't know. Yesterday, before I to went go to bed, I was thinking in about the word "got". I don't know how to use this word! Please correct these sentences : I get tired, I have to get into my bed, or I have to get some a sleep, I'm angry, because I am getting dumb! lol Thanks sense now!

I get my hair cut once a month.

I have to get up at 7.30 every morning.

I have to get the dinner ready by 7.00 tonigh.

I have to get my car repaired.

I get angry when the neighbours play loud mussic at midnight.

I have given you a few examples.