Highly-rated left-back Luna, 22, joined Villa on a three-year deal from Sevilla earlier this month after catching the eye of manager Paul Lambert with his performances in Spain.
"I know that a change of culture and environment is something I must now get used to but I'm looking forward to this.
"I'm looking forward to picking up the language and to experiencing everything of my new environment and culture in a short time.
"I've always believed that I could play in the Premier League and to have this opportunity with a club as historic and huge as Aston Villa and with a manager who is building a squad of young players with great prospects is tremendously exciting for me.
"The manager explained to me that it is a young squad but also one with good experience and everyone is hungry, everybody wants to succeed here.
"This is perfect because I am keen to make progress myself and I want to be part of this."