What is the model of your MikroTik router? Depending on the hardware you might want to use ports other than ether1 and ether2 to make use of hardware offload. Also, depending on the hardware, the configuration might be done with Bridge VLAN Filtering or over the old /interface ethernet switch menu.
The general idea is to put the two ports in a single bridge (that can also have other ports) and configure VLAN on that bridge (Bridge VLAN Filtering or /interface ethernet switch depending on the hardware). The two ports will be hybrid ports. The port towards the ISP router has VLAN30 tagged and VLAN1000 (or any other number) untagged. The port towards the switch has VLAN30 tagged and VLAN2000 untagged (but because your switch is a managed switch, this VLAN2000 can be a tagged VLAN too if you want, so that the 2nd port is a normal trunk port instead of a hybrid port).
VLAN1000 is the WAN interface with 192.168.1.2/24 and NAT configured. VLAN2000 is the LAN interface with 192.168.10.1/24 and DHCP Server configured.