"Please give me a white blouse."
Are you using a PC? In the bottom right corner it shows your default language, you can add other keyboards by clicking it. Then on the lesson you can choose if you wanna use the usual tiles or type the answer yourself.
I explained phones in another topic: https://www.duolingo.com/comment/23986114 (but I haven't seen a type in lesson on my phone yet)
Is that what you meant?
白いブラウスをください is like "the white blouse, please", implying "please give me the white blouse". The command phrase あげてください is usually used differently in Japanese, not as "give [someone] [noun]" but instead as "please do [verb] for [someone]". For example, その手紙を彼に送ってあげてください "Please send that letter to him". And 彼に協力してあげて下さい "Please help him". So this sort of "giving" is more like doing someone a favor.