Falcon in game 8, New Alexandria Help

Hi, Newbie question. I'm playing solo campaign Recruit offline & had no big issues till now. I'm at the point of piloting the Falcon & pulling my hair out trying to get this thing to climb & descend. I've reasearched this on google & i'm not the only one with this issue. They all say same thing, hold Left Trigger to climb but no go, Alt. won't go past 906-909.00. I'm doing something wrong I know. Watched YouTube videos looks so easy. What should controller settings be for flying controls? If I click on restart mission does it it mean the mission i'm on #8 or the whole campaign. Please help before I send the controller through my widescreen! lol Thanks