Try the SPEAR method:
Speeches - look for current speeches
Programs - are there any domestic or int'l programs your country has on the topic? This is most important - you can build on these.
Events - has there been any in your country, what happened? Which have they attended?
Agreements - which has your country participated in?
Reports - are there any reports which have facts and figures on past solutions
Note: Google and Wikipedia are starting points, but you need to determine what links are ads, unrelated, or biased.
Highly Credible - United Nations, universities
Credible - Governments, NGOs
Less Credible - Blogs, News Sites, Wikipedia
Position Paper How To
Learn about the UN and Model UN
Basic MUN Info
Model UN - Basics - Getting Started
MUN beginner's guide
Best Delegate - at Georgetown University https://mun.bestdelegate.com/programs-at-a-glance/
At the Conference