Hi Joe,
And welcome to the rabbit hole that is DeFi.
For most contributions to the coop, it’s a case of introducing yourself, getting stuck into the something, and then the community provides some rewards based on our assessment of you impact to our goals. (There are exceptions to this where we may have a formal agreement and pay in advance).
If your not on the discord, I would suggest you join and introduce yourself in the design channel.
[Edit, just seen you in #design…]
In terms of rewards, our system is described here: February Rewards Distribution and February 2021 Rewards Distribution - Google Sheets