WAF Policies and F5 Monitoring

Hello

I am new to Dev Central. 2 things I am looking for

1 - How to create custom WAF policies and if possible how to test it? Where WAF logs will be stored?

2 - How to monitor F5 appliance in Azure and how to generate email messages / SNMP so we can get the alerts for e.g. CPU, Disk Space, Memory etc?

Thanks