I'm playing an Artificer/Rogue (2019 version on D&D Beyond, going for Archivist but I took magic initiate and got Find Familiar) and I want to get a little more support ability by using spell scrolls, Cure Wounds, Earth Bind, Fog Cloud, Etc. But I'm wondering if my Familiar can use those scrolls. Scrolls must be read in order to be cast, but does that mean out loud or does one simply need to understand the writing to cast the spell? What if my Familiar can read and speak, but isn't a spell caster of any kind?
No, a familiar conjured from Find Familiar cannot decipher or cast any spell scroll.
From Spell Scroll:
If the spell is on your class’s spell list, you can read the scroll and cast its spell without providing any material components. Otherwise, the scroll is unintelligible.
So, in your scenario with Find Familiar, there is no familiar you can summon that can decipher any spell scrolls.
I believe this counts for all of the possible familiars, as none I can find have spell casting abilities.