Bloody hell you have the check list, you have a list of useless letters you can't remeber and you have..
Have a play with what ever you think you need before flight.
Have a play with every switch or lever before you go flying and if it all works go flying.
If it doesn't work realise that you need the avionics master turned on to get any of the nav kit checked. Radio still works, you never liked the look of the garmin things anyway
If it still doesn't work say
it and go flying anyway. And be perfectly happy thinking that you really can't be
learning that sodding garmin thing they have installed.