Hey all, please don't thrash on me for this....

I went to a guitar store today to try out some pedals, after hearing some good things I see a ME20, so I go to try it out. The problem was....I had NO ****ing clue how to use the damn thing, parts of it I figured out, but mostly the thing confused the **** out of me, so could someone please help me in knowing how to use this thing.
=>Gibson ES-137 (Custom) Classic
=>Ibanez 4String Soundgear
=>Peavey Milestone IV
=>Boss Overdrive Bass pedal
=>Vox T-15
=>Traynor 71' Bass Master
=>Traynor Custom Reverb
=>Fender 15-R