"Who are we helping?"
Translation:למי אנחנו עוזרים?
Objects can be direct or indirect. In English it is hard to tell one from the other unless the verb has both. In the given sentence "who" is an indirect object because the verb is 'to help'. It is similar to "give", "tell", "offer" and "send" in that their animate objects are always indirect.
You can get a keyboard or your OS will switch over.. You can buy stickers or a keyboard cover for placement. Personally I think my phone app does a better job.. (I have a Mac and an android phone) I have swype app on my phone.. so I swype in Hebrew too I think there's a list on the Duolingo website in the Hebrew section called getting started that lists different ways to work on your computer.
I use this keyboard cover, it works well: Casiii Hebrew English Keyboard Cover https://www.amazon.com/dp/B01DA2JHDK/ref=cm_sw_r_cp_taa_.T1PBb3DYGAD9
In my settings I simply set it so If I hit space bar & control key it switches from English to Hebrew (or back again). I forget the cover is on it fits so naturally.