Hi I'm new to habbobites. I joined because I saw someone had a love is love rainbow hashtag badge and apparently you can get them by doing activities such as completing a maze. One of the sites the recommended was this one. How do I get started on these badges?

If it was a past event, I don't think it is still available to get. Can you send us a picture or a badge code so we can check?

To get started on the current badges, go to the guide of the badge you'd like to do that is available and follow the guide.
There's lots of badges that you can no longer get anymore like Audemars stated above, but there's always new badges every week, just need to check back here on either a Monday or Tuesday and again on a Friday or Saturday so you don't miss out on future badges! :)