First Time Video Editing, need help with rendering and one other

Hey whoever is reading, I’m new to blender because I needed to create a video for a school project, I got the video all done, audio and editing and all, but I cannot figure out how to download/render/finish the video if you know what I mean. If someone could help, that would be great!

I’m also stuck on this full screen mode thing so help on getting out of this would be great.

Have to render it out. Render properties in properties editor has the needed settings. Dimensions, fps, output (ffmpeg video), encoding settings for video and audio.

Can’t help with the full screen based on the provided image.