Modbus and other Industrial Control Networks

So, I have been programming for about 4 years. Mostly just standalone PLCs controlling valves, motors and VFDs. But I am really lacking in the control network area. I find it very difficult to try to get things to communicate. I’ve worked with BACnet but that is easy and dying out. Im trying to learn modbus and other protocols. I am wondering what resources are best. And the way I learn is by doing and practice. So, I wonder if there are some good labs out there or some training courses specifically for modbus RTU, TCP, ethernet/IP. I would like to work towards a certification but I haven’t really seen any specific to control networks. I appreciate your advice and input.

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Thank you for the sales pitch. I was hoping to hear from some that would share their personal experience.