okay guys so i got the position at lloyds (wetherspoons) (people in UK should know)

okay so i did the interview the line manager said it was either me or a girl that gets the job...couple of hours later the manager offers me the position.. i did a test shift in which i did an hour on the floor (collecting glasses etc) then an hour behind the bar (serving drinks etc)

okay so my main point is when i was at the bar when i litrally say theres a good 100-200 buttons in the system in which there is also loads of categories eg spirits>smirnoff red,sky vodka etc etc (you get the point).....the guy showed me but it will take me ages to get to learn it....any help would be appreciated dont want to be behind bar and be like what do i do.....if anyone of the TTG community works at a bar or has done it will be appreciated for your help!