"Being Involved in Events is Being in Water" is one of the "master metaphors" used in language (including English). See the Master Metaphor List, page 41. The metaphor of a human entering a body of water for getting involved in an activity informs a number of idioms: "getting your feet wet", "diving in", "take the plunge", and of course "wading".
Since "wading" is the initial stage of a slow, careful process of being in water, in reference to technology, it would refer to the initial stages of being involved in some technology. Someone "wading in to digital photography" would be reading about the subject, maybe buying their first camera. As opposed to "diving in" or "taking the plunge", "wading" is a more careful, cautious way of going from not being in water to being in water. Or in the case of technology, "wading" is a careful, cautious way to go from not being involved in it to being involved in it.
You often find metaphorical uses of "wading" accompanied by other metaphorical water references:
That means it's also too early to wield genetic engineering for good but that hasn't stopped scientists from wading into ethically dubious waters by trying.
— Popular Science, "Can Genetic Engineering Create Killers?", 2015
Note the metaphorical use of "waters" referring to scientific research to coordinate with the metaphorical use of "wading".
Last December, Israeli President Reuven Rivlin visited Eli, wading through a sea of eager young men to a packed hall.
— Christian Science Monitor, "In Israel’s army, more officers are now religious. What that means." 2015
Note the metaphorical use of "sea" referring to a mass of people to coordinate with the metaphorical use of "wading"
Sorting through the types of wheat and flour to find the most nutritious or flavorful -- or the best to use for a specific purpose -- requires wading into a deep gene pool.
— Mother Earth News, "Types of Wheat: What to Grow and How to Use It", 2014
Note the metaphorical use of "pool" referring to a collection of genes to coordinate with the metaphorical use of "wading"