There’s a ton of guides for must have plugins. I’m not home right now so I don’t have a list off the top of my head as to what I use.
Quick search is a must have. Get that one immediately.
If you’re doing a table you need something that allows you to control focus and move stuff. There’s a few plugins for that. The simplest is just pulling focus of the camera (can’t remember the name).
I’m a huge fan of dungeon draw add on, it lets you create simple maps like you would a battle map.
Assuming your running 5E and you want to keep your players off their computers you might look at the dnd beyond integrations. That way they can manage their char on dnd beyond and you can sync the changes to foundry with a plug-in.
Although there may be an phone plug-in that allows just a char sheet when used on mobile.
If you do have a bunch of dnd beyond content there’s another plug-in that will scrape everything and put it into a module in foundry, kind of like a local dnd beyond so all your players can have access.
There’s another plug-in that lets you print your characters as pdfs with an actual WotC sheet.
You can also upload your source books to foundry, and use another plug-in to hot link page positions. Then skills on the sheet can be set to auto open the page of the pdf.
I’ll try to dm you my plug-in list later this week. But there’s so much stuff, just dream it and it’s probably there.