In Loki, how do you tell how much is being staked on the network? And how long does staking and unstaking take when you first activate it?
Given that the staking requirement is a known value, and the number of nodes active on the network is also known, you can calculate the minimum amount of Loki being staked on the network by simply multiplying the staking requirement by the node count. Let's take today for example:
Staking requirement (27137) * node count (465) = 12,618,705 Loki
The process of staking itself is explained in detail here https://lokidocs.com/ServiceNodes/SNFullGuide/
With the introduction of Infinite Staking, unlocking a Service Node takes 15 days. If your node goes down, it'll be unlocked in 30 days.