If you do a search for “Mike’s Amazing World of Comics”, you’ll find an index of comics, characters and creators that stretches from the Golden Age up until pretty recent.
To find comics featuring a certain character, select ‘character’ then ‘find DC Character’.
Once you’ve found who you’re looking for, their profile page will give you info about the character and two other tabs: Character Appearances and Character Chronology.
Appearances gives you their appearances in published order.
Chronology gives you their appearances in chronological order.
You can also browse by date and see what was on sale on any given week or month, in case you really want to time travel.