Choose one ability score to increase by 2, and one ability score to increase by 1. These ability score increases cannot be applied to the same ability score.

You are made from lightweight plastics and metals, making you far lighter than a human of similar size.

You are resistant to poison and immune to disease. You don't need to eat or drink.

When Mending is cast on you, you can spend one hit die to regain hit points, adding your constitution modifier to the number rolled. You can do this a number of times equal to your proficiency modifier per day.

Additionally, your creator designed you with healing magic in mind. You can be healed by spells or features that normally cannot heal constructs. 

You gain two additional skill proficiencies. You may change these proficiencies when you gain access to a computer with sufficient hardware to download new knowledge into your memories, deleting the old proficiencies. This process takes 1 hour, which can be done as part of a short rest.

You understand common, and can learn any language permanently by similar means.

Additionally, you can use this method to gain an armor or weapon proficiency, though you can only have one armor or weapon proficiency learned in this way at a time.  Medium armor and shield proficiencies are separate for this method, and you cannot learn medium armor or shield proficiency without light armor proficiency, nor heavy armor proficiency without medium armor proficiency.