I want to place 2 codes; a pay pal button and adsense.
Do I google my own site and go to the actual page and go through the procedure (view, source and paste the html code there?
Or do I go into my website builder? (I know how to copy and paste)
1) you manage your site on an admin C panel, you need to edit with website editor, and in source code view lets paste the html codes. You should see if your online website editor has features, such as: AD manage AD codes.
2)you have FTP access to the site, you need to download with it, and place the advertisements and paypal buttons into the source code.