Your body is soft, gelatinous, and easily harmed by physical force. You cannot wear armor of any kind, even magical armor. You can wield shields normally if you are physically able to hold them with your tentacles.
Your unique physiology also limits what kinds of magic items you can attune to or wear; items designed for humanoid limbs may not function for you, at the DM’s discretion.

You possess two primary tentacles capable of fine manipulation and 1d6 smaller secondary tendrils that can hold and secure objects.

• Your two large tentacles function similarly to humanoid arms for the purposes of
  holding weapons, wielding a shield, manipulating objects, or performing somatic spellcasting.

• Your small tendrils can:
  • Carry bags, pouches, and adventuring gear
  • Secure items beneath your body while drifting
  • Retrieve or stow objects as part of normal item interaction

• You can only wield or use items that do not require humanoid-shaped hands, fingers, or arms. The DM decides how specific magic items function for you.

• You cannot benefit from worn magic items that require humanoid body shapes (such as boots, gloves, helmets, or most armor), unless the item explicitly states it adjusts to the wearer’s form.

• You count as having two hands for rules that refer to holding, wielding, or gripping items.

You do not need to breathe. You are immune to suffocation and can survive in airless environments such as deep water, toxic fumes, magical voids, or vacuum.

Your body is composed of layered arcane jelly that absorbs elemental force but tears easily under physical impact.
You have resistance to acid, cold, fire, lightning, poison, psychic, and thunder damage.
You also have vulnerability to bludgeoning, piercing, and slashing damage.

You have advantage on saving throws against spells and other

You can telepathically communicate with any creature you can see within 120 feet.
A creature must understand at least one language.
Your telepathy conveys emotions, memories, and sensations, allowing for deep communication.

You perceive creatures and objects through psionic and bioelectric vibrations. You are affected normally by magical darkness.

 if you fall, you gently float and descend 60 feet per round until you land. You cannot take falling damage.

You can squeeze through any space large enough for a 1-inch gap without squeezing mechanics.
This does not allow you to bypass magical barriers.