I think there's no pic needed, text must suffice...would be hard to put that to an image or video, I guess
never mind the "hehe", I've got spare time, am bored & have lots patience naturally.
have you dug the difference between "instruments" and "samples" yet? each "instrument" is a map of samples on a piano-keyboard. each instruments has 16 sample slots. so best is in the beginning, to use one sample per instrument, as sample "00". to select an instrument, or an sample just click the list "instruments" or "samples" on the top right of the screen. you'll see that instrument/sample line will be "lit" like instrumen "01" & sample "0" in the pic you gave.
so for a start create/load a sample in "samples"-slot "00" while "instruments"-slot "01" is selected. to select, just click the list. then hit the "rec" button, so it's red, move the "cursor" (the gap in the middle line of the tracks view, that is moving with the arrow keys) so it is at the first 3 dots of the 10 dots of any track collumn. hit the "q" key of your keyboard, and a note "c-5" with an "01" next to it (the instrument number) should appear. you now have done what you were asking for in the image in your first post, putting a note of instrument 01 to the first row of the first track, and the cursor jumps one row down. hit some other letter keys, or the number key row above the letters, and other notes than "c" will appear in the list.
unless you fiddled with the ins.ed. piano (it should be showing all zeroes when "edit" next to it is pressed), the notes should playback sample number "00" (of the samples list, when the instrument is selected) of that instrument. you can name your instruments & samples by right clicking the huge space next to their numbers, and entering some useful text there. try that with a sample, and then select another instrument. and then reselect the instrument that was selected when you entered the sample name, and you might get the idea
if you "created" your samples in all the sample slots of instrument 01, you can move them to slot 00 of other instruments with the "copy/swap" buttons in the lower right corner of the in.ed. screen. bit hard to handle, but works...
but now my patience is gone, and instead I'm dreaming of a document, that explains the interface for people, who've never seen a tracker before, so over & out...
p.s. don't feel dumb, just fiddle around in the meantime, yes, the program is really hard to handle for people who don't already know it of fast tracker 2...