Swap between PPPoE and DHCP quickly?

RouterOS Beginner Basics
1

First time MikroTik user, preparing for first config.

My plan was to sit behind double NAT for few days to make sure everything is configured properly (before calling my ISP to switch their router to bridge mode) then swap from DHCP to PPPoE config. But after the quick look at First Time Configuration I noticed that “pppoe-out” is referenced everywhere instead of “ether1”, so I can’t just quickly toggle between DHCP to PPPoE configs like in “normal routers” and need to reconfigure everything from scratch with PPPoE in mind?

2

Not really,
If what you have is somewhere near the default Mikrotik config,
(Which is a very good starting point)

You can just add a pppoe client (With appropriate options)
Then add this pppoe client to the interface list WAN.
Presumably both it and your current WAN port will be on ether1.

Then just disable the dhcp client.
And enable (if not already) the pppoe client.