Keep in mind that the 7:00am start time is Orlando time, so if you're in a different time zone and want to be on when the window opens, you'll need to be up even earlier.  For this west coaster, I have to decide if I want to wake up shortly before 4:00am to get my FP+ reservations and then go back to bed. 
I agree with this.  It takes me about 20-30 minutes depending.  Honestly, if the process intimidates you right now, make practice FP+ reservations today for 30 days out just to see how to do it. 
And pro tip from me.  Know what your FP+ reservations are after you make them.  During all the in and out of my phone during the Dark Side Half this year, I somehow managed to cancel my Flight of Passage FP+ during the race with all the apps that were open.  When I realized it was missing later that morning, I went to concierge at my resort and they were able to find out the time of my reservation cancellation which was indeed during the race.  I went to Guest Services at Animal Kingdom the next day and they were able to restore my Flight of Passage FP+ reservation.