Besides the links below, check the Resources page of the Secret Barrister's website. The section on Mentoring and Networking includes a wealth of organisations and initiatives aimed at improving social mobility and making the Legal Profession accessible to people from all backgrounds.
Check the best sites for finding statistics and data from our Statistics guide
You should always evaluate the information you use but especially so if it is available freely on the internet.
The SIFT (four moves) method devised by Mike Caulfield suggests 4 things to do when looking at a source to help you evaluate it.