Well, you have to be careful where you place your skepticism. Some science is complex, but some science is simple.
So when most people -- including most experts -- say "global warming", they're referring to the observed and predicted increase in the average temperature measured at the surface of the Earth. The observed trend, both the direct measurements and the inferences made about historical temperatures, is pretty solid science.
But there's another way to think about global warming, and that is the heat content of the Earth. The Earth generates a little bit of heat itself, from its radioactive core, receives a boatload more from the sun, and then radiates most of it off into space. And we're also pretty confident that a little surplus is left over. That little surplus of heat goes to heat the oceans, melt the ice caps, and also towards the atmospheric heating that we commonly refer to as "global warming".
Now, this underlying change in heat content is relatively simple. It's a lot of work to measure -- you need to keep track of how much ice there is, measure the temperature of the oceans at various places and times and depths, track atmospheric temperatures. It's also not guaranteed to be constant -- if the albedo of the Earth changes (like through there being more or less ice, or lots of dust going into the air) or the composition of the atmosphere dramatically changes, Earth will gain or lose heat at a different rate than it is now. But it's still relatively simple.
Where it gets complex is how this change in the heat content of the Earth relates to climate. There, you've got a million variables. If the oceans heat faster or slower, the atmosphere will heat faster or slower. If it affects wind currents, you can get warmer or or colder air pushed into places it doesn't normally go. If it affects the ocean currents, the climate in some parts of the world could get dramatically colder, even as the heat content of the Earth continues creep up. If it somehow magically melted all the ice first, without changing the surface or ocean temperatures, you'd have no climate change at all for about a thousand years, but the oceans would rise dozens of feet over that same time. If the atmosphere heats first, the climate would get dramatically worse but the ocean levels would stay the same.
So I think it's quite reasonable to be skeptical about any specific predictions of how the climate or the conditions on Earth will change as the Earth continues to warm -- that is complex. But I hope you aren't terribly skeptical that the Earth is warming, that its total heat content is going up -- that is much simply, much more definite. It may not be certain how this will affect the climate, but so far none of the options look good.