How do you say "the" it aounda like you add an alef to the beginning, but it's not written like that.
ה - the אבא - dad You simply add ה to the beginging of a word to make it "the ---"
I can not switch to a hebrew keyboard. There should be one built onto the site like google translate has.
If you're using Chrome, check out "Duolibro", a Chrome extension that automatically changes the input language to the one you need.
You don't have to do anything to your keyboard. You can install Hebrew on your computer, and switch back and forth between your own language and Hebrew. (In Windows 10, you press the Windows button and the space bar to switch languages).
It is accented on the end. I know this because I have been learning how to read Hebrew for about 7 years now from a Rabbi... but never how to speak it. So I'm using Duolingo.