Sidenote: you will still need one, but by the end of the guide you should only need to deal with this process once per year, assuming nothing changes.
Note
If you're a visual learner, you can use IgorAkou's video - thank you o7
Keep in mind this may not reflect the current state of the guide at some point, should be identical for now though
Warning
If you are doing this with a fresh DMM account, your date of birth will need to be set in the account settings on DMM's website.