The most common adverse effects following immunisation reported to the TGA are predictable and have been observed with many other vaccines. They include headache, muscle pain, fever, chills and injection site reactions.
The most common reactions reported for the AstraZeneca COVID-19 vaccine in the week of 12-18 July 2021 were headache, fever, muscle pain, fatigue and chills.
The most common reactions reported for the Pfizer (Comirnaty) COVID-19 vaccine in the week of 12-18 July 2021 were headache, muscle pain, fatigue, dizziness and nausea.
https://www.tga.gov.au/periodic/covid-19-vaccine-weekly-safety-report-22-07-2021
https://www.health.nsw.gov.au/Infectious/covid-19/vaccine/Documents/adverse-event-reporting-guidelines.pdf
if you want more --- Astra Zeneca adverse events
really there's not a lot of side effects.... the important point, imo, is that covid has very serious adverse events.
if that isn't conclusive enough....... you can take a horse to water hey ;-)