whoo hooo, we like pics...
as for goals for tank peramters...
for now, you have a fish only and will deal with just pH, salinity, ammonia, nitrite, and nitrate test results
you wont need to worry about ALK or CALC for a bit, until you decide to get some corals...
your ammonia seems a LITTLE high, but that is prolly due to your tank being newish
as for tank temp, 75 is ok, but please dont go too much cooler if at all
you can adjust the heater to be a bit warmer... typically heaters have a knob/adjustment on top, and you rotate it...if the heater is currently off, twist it until the heater comes on.. (just barely), and then wait a bit, and check your tank temperature, and see if it is a bit warmer, or cooler, (if cooler you twisted in teh wrong direction)
you can generally play with the adjustment knob and see/hear the click of when it comes on and figure it out
as you can tell, there is some 'play' in that adjustment knob, which is why i suggest folks to get the auarium controller or the reefkeeprlite, (at least)
these are external controllers that do not only temperaure, but also timers and general programming...
i.e. turn on heater when it is too cold, turn off heater when it is too hot...
turn on fan when it is too hot...
turn on lights when it is time.. turn them off when it is time to shut off
Turn on fan when the wter getss too warm... ALSO, turn off the lights if it continues to get warm, and tthe fan isnt enough...
send me a text message when the wter continues to get warm even though the lights are off and the fans are on...
so, it is a smart timer...
but, it is a very important 'redundant' tool that will safegard your tank