A 1-0 away win is not enough because of the away goal rule (when teams scored the same number of goals the one with more away goals advances). You need to win at least 2-0 or win by one goal and score more than 2 (e.g. 3-2) to advance. If you win 2-1 the match will go into extra-time.
About the formation: Block the center, attack over the flanks. 4-5V-1 (put red arrows on DL and DR) and 3N-5V-2 are suited to do so.