WAF Policies and F5 Monitoring

Looks like you have zero knowledge about ASM, you should start from reading this article:

https://devcentral.f5.com/articles/the-big-ip-application-security-manager-part-1-what-is-the-asm

Part 2 is talking about Policy Building.

F5 appliances can be easily integrated with SNMP monitoring, all documented and guides available, here is one:

Configuring SNMP

Hope this helps,

Sam