Obviously, your initial views wouldn't have included beliefs about terms like "greenhouse gas forcing"
In my case this is wrong. Carbon dioxide absorbs infrared? Duh. The only change in my views since the beginning has been learning that the role of clouds is unclear (they may contribute some negative or positive feedback, depending on which types increase or decrease in prevalence). That increases the error bars for magnitude of warming, but that's in line with IPCC forecasts. Since solar forcing seems unlikely to change that much in the next few decades or centuries, anthropogenic changes to the atmosphere will be the main drivers of climate.
As to what to do about it, geoengineering looks like the best first line of defense, though that's an opinion I hold with great uncertainty. Unfortunately, ocean acidification won't be helped by (e.g.) making more clouds at sea (which could stabilize global temperature).
Note: Please see this post of mine for more on the project, my sources, and potential sources for bias.
I have written a couple of blog posts on my understanding of climate forecasting, climate change, and the Anthropogenic Global Warming (AGW) hypothesis (here and here). I also laid down the sources I was using to inform myself here.
I think one question that a number of readers may have had is: given my lack of knowledge (and unwillingness to undertake extensive study) of the subject, why am I investigating it at all, rather than relying on the expert consensus, as documented by the IPCC that, even if we're not sure is correct, is still the best bet humanity has for getting things right? I intend to elaborate on the reasons for taking a closer look at the matter, while still refraining from making the study of atmospheric science a full-time goal, in a future post.
Right now, I'm curious to hear how you formed your views on climate change. In particular, I'm interested in answers to questions such as these (not necessarily answers to all of them, or even to only these questions).