Moved to the Tanker forum where it might get more tanker eyes.
While Mids is not directly under Homecoming, it is a great tool for designing your character's build. https://midsreborn.com/
In many threads you will see players posting and asking for critiques.
If you are going to just slot SOs, I think a rule of thumb for attacks is one or two accuracy, three damage, and then either endurance, recharge, or both, depending on the stats of the power and your build goals. Then for armors three resist or defense and an endurance, maybe a recharge if it's a click and not a toggle. As rules of thumb, there are many reasons and certain powers that might call for a different slotting.
That said, I personally start slotting attuned IO sets as soon as I can and basically ignore SOs other than drops or to fill a hole until I reach the level to slot my preferred IO set.
Good luck with your tank! Tell us how it goes as you level.