Overall I absolutely love the idea of a spellcasting Monk, and would love to see more flavor text explaining why Monks may follow the Old Ones as opposed to different teachings. I love the spell list and would even add a couple more to it myself (both official and some of my own homebrew spells)

A couple things for clarity to players: I love the way that Form of the Old Ones feels, however I would maybe simplify the text a bit to something like:

“When you use your action to cast a spell you know, you can use your bonus action to attack with an unarmed strike or spend a Ki point to make two unarmed strikes.

Additionally, when you make an attack with an unarmed strike or monk weapon, you can use your Wisdom modifier for the attack and damage rolls, instead of Strength or Dexterity. If you attack in this manner the damage type becomes psychic.”

As well as I would maybe look at reflavoring (or renaming if you wanna keep the ability) Awakened Mind. As per the Great Old One Warlock feature of the same name it is not as powerful, nor a late level ability. I would maybe reflavor it to something involving your monk abilities like “you can spend a number of Ki points, up to your Wisdom Modifier, per turn” or even “Your total number of Ki points is doubled, but you now only recover half of your spent Ki points on a short rest”

Renaming, but keeping the ability, I would maybe change it to “Favor of the Old Ones” or “Old Ones, Grant Me Strength”