Hi Deadstroke174... Welcome to TFK!!
Can't wait to see a pic with the background. I think you will find that the lighter coloured columnns and stonework will pop and be very noticable. You might even find yourself darkening your gravel... I switched my 10 gal to black recently. It's very striking. (shows more poop tho!)
Anyway, Love how the 2 cats hang out on their tower to watch! Make sure your tank top is strong as you may find one of them on top one day getting a drink or trying to touch one of the fish that come to see who is peeking into the back open slot of the top... (speaking from experience).
As for Mollies... as they are not as hardy a fish as they used to be (inbreeding), they are not a good choice for cycling a tank (can die in this process). You have not said how old this tank is, and as you did not have the API test kit yet, we don't exactly know where you are in the Nitrogen Cycle. If you set his up after Christmas then it is still quite early. I'm not sure exactly how many plants it takes to protect your fish from the cycle exactly.
When you get your kit, read all the instruction for each test... do not skip the shaking of bottles or the time schedule for reading the results 5 min, 10 min etc, don't come back a half hour later cause you forgot. They are very important. Also read your results in Daylight at a window or outside... not in direct sunlight too, nor lamp light. These distort the colours you are seeing. Keep a little calender of events of your tank, a written journal of your numbers and additions/deaths/water changes/numbers... it is most helpful when you try to remember how long ago something happened.
Yes the more live plants you add the better to neutalize this cycle. Maybe some floating ones or something that will grow tall to the full height of your tank to help fill in and create a natural effect. Plant them in the back corners and they will grow up into those areas. The shorter one in mid area and shortest in front.
Enjoy... it's a learning journey... can't wait to see your progress here with more pics ongoing.