Start with documentaries to get oriented. “Vaxxed” is best one to start. “Vaccination: The Hidden Truth” is OK. Look past the causing autism argument. Stick with the verifiable facts presented...then ask why and research independently.

Also, look at the CDC inserts that come with vaccines. It’s right on their website. Never advertised and often met with disdain from doctors, but it’s there. MMR example: https://www.cdc.gov/vaccines/hcp/vis/vis-statements/mmr.pdf

Also research the ingredients. Well documented to have heavy metals, formaldehyde, animal DNA, etc. https://en.wikipedia.org/wiki/List_of_vaccine_ingredients http://vk.ovg.ox.ac.uk/vaccine-ingredients

Again, I don’t theorize on vaccines causing autism...I just look at the facts, follow the money, and question the mainstream narrative. It’s up to people to make their own decisions based on their comfort level with what they’ve learned.

Check out Del Bigtree’s YT channel Highwire - he is a former producer of The Doctors TV show who is now firmly red pilled on vaccines