How to do... anything?

[DevLife]

Sorry if this is the wrong place.
Our forum had a group of admins, out of which only one knew how to deal with the coding. He has now quit and a couple of things have stopped working. I was looking for tutorials, but I don't even understand what they're talking about. Where to start learning? Help?

If anyone wants to help directly, the problems are the Enhanced Account Switcher button not popping up and [align] not working for images on one of the themes.

Please post the topic here https://community.mybb.com/forum-72.html