Question Where to Look for Paying for Unity Tasks + Appropriate Costs

Goal: Paying Programmer

Hey all,

Note: If this is the wrong place to ask, where should I ask these questions instead?

I was wondering:

—where to find verified programmer(s) that I can pay for freelance jobs? So far, I have seen Fiverr, Upwork, Unity Forums and more. I feel overwhelmed. How can I prevent scamming, rip-offs, and/or thievery? I have a limited budget so I want to be precise.

—what would be a reasonable cost to pay a programmer to (for each step):

——add a very basic multiplayer card game (a way simpler version of Hearthstone, Magic the Gathering etc. )?

——add a new feature to the card game?

Side Note: I am making my own game, but I have limited time, which is why I am considering outsourcing a part of my programming.

Note: I am not asking here for offers. I am asking where I can look for those who perform this work.

Thanks!