In the second leg, Dortmund must try harder to get a win in the deciding match. A draw is not good enough, but looking at the performance of both teams, it is considered fair and quite satisfying for both teams. But in the second leg, of course, everything will be different, Dortmund might be able to get a win with their full effort. I hope to see a really all-out match from both teams in the second leg.
If you look at the appearance of both in their respective Leagues, it is not much different so it is still quite difficult to predict the course of the match in the second leg. Lille is more advantaged by the draw obtained when playing in the first leg so that the game in the second leg will take place at home. In terms of pressure, Dortmund may be much greater, but anything can still happen. Hard work will determine the results and if the coach has a better strategy then one of them still has a good chance of winning, although Lille itself is much more advantaged playing in front of their own audience.
Yes, Lille will benefit from playing with their fans' support. The situation is still difficult to predict and will depend on the team's readiness and the strategy used by both coaches.
Dortmund or Lille still have a chance to win. It's just that there is a possibility that the match will be decided by extra time or even a penalty shootout. When both teams cannot win in normal time, then the next thing is about their mentality.