Here are some websites that provide good information regarding your Bar or Bat Mitzvah, across a number of topics and from different perspectives. They are websites that are also good for other Jewish information. Naturally, we have not read everything on these sites, but they are good resources.
Reform Judaism: reformjudaism.org/tags/bnai-mitzvah
Reform Judaism includes material from across the breadth of Reform Judaism.
My Jewish Learning: myjewishlearning.com/category/live/bar-bat-mitzvah/
My Jewish Learning includes material on a wide variety of Jewish topics and perspectives.
Green and Just Guide to Simchas:
Diversity in Jewish Life: https://18doors.org/tag/bar-bat-mitzvah/
18 Doors provides useful material for anyone, focusing on diversity within the Jewish community.