ACLs vs Static Routes

Using a TP-Link system: Omada controller, Gateway and managed switch.
I have it up and running with 4 Vlans, not including the default Vlan 1.
But, it’s not finished yet… all the vlans can talk to each other and I don’t want that.
I’m in an area where I don’t completely understand what to do.

Does a static route override an ACL?
How many ACL entries can I create before seeing a slowdown?

Any and all suggestions are welcome.

I want all Vlans to have internet access but not be able to communicate with each other.

Should be simple Big Grin!

I have not really done much with the Omada gateways but I think you need to put in deny rules so the different networks can not see each other.