Student or Learner
Study abroad or Study in abroad.
Actually I've searched the right variant in many websites, in some there was written with "in" and in others without "in", so I got confused.
Тhanks in advance!
Don't use in abroad.
Abroad means "in a foreign country" or "to a foreign country".
Study abroad. (Study in a foreign country.)
Travel abroad. (Travel to a froeign country.)