The databases you will be using are not like Google. Break your question up into smaller keywords and use the Advanced Search function when possible to combine your keywords in your search.
The following databases are free to search but may require a subscription to view the full-text articles. You may be able to view short articles and some fact sheets.
When searching for statistics, be aware that sometimes the most current statistics will be a year or two behind, depending on if the information is made available to the public at this time. Also, look out for bias: statistics can be presented in a way that purposely steers the audience to one side or another.
In addition to the following websites, try doing a Google search for the statistics you need. To only search government sites, use the following technique:
This will tell Google you only want to see information from sites that end in .gov.