This video has a debate about global warming with 6 people including Richard Lindzen (an anti-global warming debater and scientist):
A good way to begin a debate about global warming is to watch this video and say which ideas you think won the debate, what you found convincing.
So e.g. I might talk to one person who says "yeah Lindzen won that debate, his opponents were mediocre, but global warming is right b/c of some other arguments they didn't use". And a different person would say "i thought global warming won that debate". Those are two really different perspectives that are worth separating.
if someone says I'm right to think global warming lost in that particular debate, i'd want to know what they think is convincing. e.g. is there a debate Lindzen lost in video or, even better, writing? or are there some arguments he's never given a response to?
if someone thinks global warming won that debate, I'd want to know how they evaluate some specific statements. analyze some quotes from both side of the debate. show me some mistakes from Lindzen and his allies, and some key points from his opponents that should have been convincing but which he ignored or answered badly.
i think the pro global warming people in the video are irrational clowns who make fools of themselves. i say that not to flame but to express a perspective. i think it's a notable difference whether i evaluate someone as a clown and someone else sees a rational debater or, alternatively, they agree those people are clowns but think there are some much better pro global warming debaters elsewhere.
i too could analyze some specific statements. but i don't want to do it preemptively. it'd be a bad way to proceed with someone who says that particular debate wasn't convincing for global warming but something else is. if you want me to do it, debate me, say you think that video is convincing re global warming (rather than that you'll want to rely on other sources), share some of your analysis, and ask for mine. i find, in general, despite the alleged 97% consensus for global warming, there's a shortage of people who disagree with me and are willing to rationally discuss the matter.
People often want to debate the issues directly, from scratch. If your goal is to reach a conclusion about the field (rather than to practice debating or learn some introductory info), it's much more effective to look at what's already know, what smart people who study it have already said, and try to evaluate some of those ideas. Using existing knowledge gives you a head start compared to starting over. Looking at a debate like this helps you start to get a picture of the field, the issues, the relevant arguments, and so on. It's incomplete, it's in voice instead of writing, there are many flaws, but it's more productive to start with existing materials and then point out problems with them and start adding in some other sources rather than to start at zero and say you're own ideas about global warming.
PS here are some other videos with Lindzen that I liked: