There are several ways to select your photos.
Select a few files: hold down the ⌘ button and select multiple files.
Select all files: Press ⌘ and the "a" button for "Select All"
Select several photos from a long list:
"Pick" the photos you want to export by pressing "p" (Unpick by pressing "u")
Filter to "flagged photos" using the filter function in the lower right-hand part of the window or the top filter bar on the library page.
Press ⌘ and the "a" button for "Select All"
There are several ways to select export
On the library page, there is an export button on the lower left-hand part of the screen
Right click on one of your selected photos and select "Export" from the menu that appears
From the File menu at the top of the screen, select "Export"
Press "Shift Command E"
The first time you export images, you'll need to select the folder that you want to save your exported images in. You do that by selecting "Specific Folder" in the "Export To:" drop down list. Then you'll select your destination by clicking "Choose..." which should be:
Desktop > YourName > 2-Exports
It should remember the location where you picked last time. As long as you don't change it, it should always go in the same folder. You can check by looking at the address listed after "Folder:"
Check the "Into Subfolder" option in the Destination area.
Pick a folder name for this group of photos. Usually it's the name of the project you are working on.
In the File Naming area click the checkmark next to "Rename to..." and select "Custom Name - Sequence"
On the next line where it says "Custom Text" type the new name for the files. Include your name and the project name. End the text with a dash "-"
DoF YourName -
Change the start number to "1" unless you want to start with a different number.