How can I see what went wrong inside a Github CI run - github-actions

Question

I am new to Github CI and trying to setup Mysql with a specific username and password to test my Django project as per the below .github/workflow file but when systemctl starts mysql an error occurs:
Run sudo systemctl start mysql.service
Job for mysql.service failed because the control process exited with error code.
See "systemctl status mysql.service" and "journalctl -xe" for details.
##[error]Process completed with exit code 1.
is visible in the github actions log. The question is: how can I know what went wrong? Is there a way of viewing the output of journalctl -xe for example... Other ideas welcome.
This is my workflow file:
name: Django CI
on:
push:
branches: [ master ]
pull_request:
branches: [ master ]
jobs:
build:
runs-on: ubuntu-latest
strategy:
max-parallel: 4
matrix:
python-version: [3.6, 3.7, 3.8]
steps:
- uses: actions/checkout#v2
- name: Set up Python ${{ matrix.python-version }}
uses: actions/setup-python#v2
with:
python-version: ${{ matrix.python-version }}
- name: Set up MySQL 5.7
uses: mirromutth/mysql-action#master
with:
mysql version: 5.7
mysql database: apis
mysql root password: mypassword
mysql user: myuser
mysql password: myotherpassword
- name: Install Dependencies
run: |
python -m pip install --upgrade pip
pip install -r requirements.txt
- name: Run Tests
run: |
sudo systemctl start mysql.service
python manage.py test