How do i start every sentence with a capital ?

Dude, they are correct, shift does give you an upper case. I do have another way of doing it and it is an automatic upper case every time you follow a period. If you have use of an iPad it has an auto capital/uppercase after every period. So you could do your writing on an iPad and transfer it to your computer, or you just learn to use the shift key. learning the shift key is so much cheaper.

Don't touch the caps lock. Just use the shift key. It's called for way less often than every two letters.

You don't have to press the Caps lock button every time, simply hold the shift key and press the letter you would like to have in uppercase at the beginning of a sentence or when naming something. The shift key in between Caps lock and the control button.