Good news to see different bodies appear to which we can delegate out UNI.
Can you share some information or articles with the rules about delegation and how people can opt out eventually?
To delegate you head over to https://app.uniswap.org/#/vote and click on the delegation button once you have done so another window will present you with the options to self delegate or to delegate to someone of your choosing
Once you are satisfied with your decision you click on Delegate Votes to complete the process.
To increase your delegation you simply increase your UNI holdings. I found this out when I bought some UNI went to increase my voting power and noted that the system had done it for me.
As far as removing delegation it seems that there are two ways to go about it do I am only making assumptions.
You simply delegate to someone else or move the UNI to another wallet.
My UNI seem currently spendable do I might not be correct in this regard. It is not locked in Uniswap such as when liquidity is provided.