Firstly no u don’t need either 7 times or 2 hand (just lechatchila 2 hands 4 halel and ikur naanuim)
And secondly no one cares if u cut the line but the people who do normally push past and bump into everyone else in their ‘zerizus’ for the hakafos
A mentsch would stay where he is
I doubt any rov would cut the line if the kehilla was moving slowly