In way over my head in Illustrator

[Garnock12]

My boss handed me Illustrator and asked me to create print ready artwork with bleed marks for #10 window envolpe So we can have them printed with our logo and address.  I don't even know where to start!!

I have opened some existing AI files we have but they are all 8.5 x 11 and honestly I couldn't learn anything from them.

I'm not asking for someone to hold my hand.  I just need to be pointed in the right direction.  Surely it can't be that difficult.  It's only a little text and a jpg file all in one color.  My art experience lies in CAD drawings and a little in Actobat.

[Monika Gause · Accepted solution]

Coming from Germany I've never heard of that. But here you can download a template file: https://www.envelopesuperstore.com/10-window-envelopes-24lb-bright-white/sku-1030 

[Garnock12]

That is a uge help!!!!!  IF you can tell me how to rotate the workspace from portriate to landscape I should be able to handle it from there,

[Monika Gause]

For that just select the artboard tool and then adjust the size of the artboard. You can select from the menu in the top left in the control panel (Window > Control)

Also: just to be safe: I would select the rectangle in that template and check the size in the transform panel. Just in case.