I am currently looking clean way to create a racial feat like the Changlings "Changeling Instincts" or Lizardfolk's "Nature's Intuition." The sort of feat that allows a player to select 2 of a subset of skills.

I want my feat to have a specified subset that is different from any of the current groupings, but when attempting to a Modifier -> Proficiency -> "Choose" such as what is done when looking at a copy of the Lizardfolk, for example, there is no way to create a custom "Choose a X skill" type option that I am looking to make.

What is the best way to go about doing this?

Create several Options, 1 for each skill and attach the Modifier for the corresponding skills to the correct Options. Like, say for example you want it to be Perception or Persuasion. So then you would make 1 Option named “Perception” and attach Modifier: Proficiency->Subtype: Perception to it, then you would make an Option named “Persuasion” and attach Modifier: Proficiency->Subtype: Persuasion to it. If you need more help properly setting up Options, please consult the Homebrew Subclasses & Races FAQ #1: (https://www.dndbeyond.com/forums/dungeons-dragons-discussion/homebrew-house-rules/131411-a-homebrewers-how-to-faq).

I hope that helps.