RouterOS Gateway

Hello guys,
I have question about make RouterOS Gateway in our network.
we have 1 range in our network that is 192.168.30.0/24 and we’ve 2 Internet link(2 IP) in our network. All of our client has set as static and for Special purpose we give one of this Internet link. I install a RouterOS in a VMware that access to the Internet. I want to set this RouterOS IP in clients TCP/IP setting. But our client can’t access to the Internet. why? Do I need to add a Route?
I apologize if my writing is not good in English.

Start from drawing an overall network diagram. It’s not clear from the text description how the clients are connected, what’s the “special purpose”, and how the clients are connected currently - do they currently have any connection to internet?

No need to spend hours on drawing the diagram using some graphic editor, just use a paper and a pencil and post a photo of the result.