Arcane Trickster Rogue and Spider Familiar — Sneak Attack Combo

My idea is to keep my spider familiar on my shoulder (it's a Tiny creature with Spider Climb) so I can consistently qualify for Sneak Attack.

According to Sage Advice, a familiar counts as an ally for the purposes of Sneak Attack. Since the spider would be riding on my shoulder, whenever I'm within 5 feet of an enemy, the spider would also be within 5 feet of that enemy, satisfying the Sneak Attack requirements.

Also, since the spider would be carried by me rather than using its own movement, it shouldn't provoke opportunity attacks when I use Cunning Action to Disengage and move away from the enemy.

I'm aware that this strategy comes with several risks for the familiar, such as area-of-effect attacks and other threats, but I believe it's still a valid combo under the 2024 rules.

Am I interpreting these rules correctly, or is there anything I'm overlooking?

RAW, seems legit to me.

The next rule is also relevant, but I'd say your scenario is not affected by it:

You can’t willingly end a move in a space occupied by another creature. If you somehow end a turn in a space with another creature, you have the Prone condition (see the rules glossary) unless you are Tiny or are of a larger size than the other creature.

Btw, wouldn't it be easier with an Owl (Fly speed, Flyby if needed, and it's also Tiny)?

EDIT: for clarity.