manage Internet traffic on two connections using two different Internet service providers (ISPs)

Amr_Ali I believe the following two links should assist you with this.

https://techdocs.f5.com/en-us/bigip-15-0-0/big-ip-local-traffic-manager-implementations/configuring-isp-load-balancing.html

https://techdocs.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/bigip-system-ecmp-mirrored-clustering-12-1-0/1.html

The mechanism that you most likely want is called ECMP and should allow you to distribute connections across two different ISP connections.