Scared of Flatline

Hey!
My Name is Louis, im 18 Years old, im from germany and ive been addictet to PMO for about 5 years.
Ive been trying Nofap for about 2-3 Months now, and im always on like 3-5 day streaks, which is an improvement because i used to PMO at least once a day.
My longest streak was 7 days long.
Im in a relationship right now, but i cant have intercourse until january, which is fine with me because it gives me time to reboot!
Im starting a new job in january, and im really looking forward to it, but im scared that the flatline is going to kick in around that time, and that i cant perform at my new job
How bad was your flatline? Was it so bad that you couldnt perform at your job?
Are there things to do to shorten the flatline? Do you guys think i already did some healing to my brain because i cut dowm PMO the last couple months?
And can i have intercourse with my Girlfriend as soon as i can or will it destroy my reboot?
Hope you guys can help me, keep it up!
Much love from germany!
Peace!