Translation of capability in Spanish

Will you be online in 1 hour? I saw your translations and had some comments: rainbow is it 'arco iris' or one word arcoisris? Usually all words appear lower case. Sometimes it is uppercase. It all depends.
I usually do not travel, and if I do, then only to England, when I visit my parents who live in a suburb of London. I can not afford to travel too much, because it is a very large expense.
I'd be very happy if you could correct my Spanish. In return, I'll help you too, of course. 3 years ago I traveled to Chile to visit the country, only for a month, unfortunately. Loved the Cordillera!