Choosing the best place to search is always a challenge!
To be honest, there actually isn't one, single, best place. When you do research, you will want to search several different places.
The key thing is knowing what you are searching, and being strategic in where you are searching.
Try this:
Use filters on the left to limit by specific source type, date range, and more.
Google can be a great starting place, but learning how to use some of the advanced search techniques can help you to quickly find what you need.
Eliminate any words that are not needed. Think of just the main words or concepts you'd like to find on any given webpage and search those.
Government agencies are responsible for collecting and presenting data. Additionally, educational websites can be useful for finding information that may have undergone additional editing, or likewise, you may be able to local scholarly article that have been uploaded on them.
That is, wrap relevant phrases in quotation marks to keep the words together as a single term, rather than as individual search words. For example, Google reads the phrase search of "medical marijuana" as a term while simply, typing in medical marijuana without the quotation marks will ask Google to search those terms individually. This can be helpful to use when looking for exact titles, or names of authors.
Current statistics are often best found on government websites rather than in older articles accessed through databases. Trying to search for these online, adding the word statistics to your search, can be helpful.
Look for articles from reputable sources that cite their sources, list their authors (either corporate ones or individuals), and provide evidence that the information they present has been researched.