M.D.
Are they actually online? Or in various folders on your computer?
If there are in various folders on your computer, which is what it sounds like from your description, here is what I would do.
1. Click on the folder at the bottom of your screen (file explorer shortcut).
2. In there, click on "This PC"
3. In the top right, there is a search bar. Put .jpg in the bar, and press enter. That will bring up a all your pictures files that are saved on your computer.
4. On the top left, click "view"
From here, you can click "Large Icons" to see a small image of each picture to decide what to keep and what to delete.
If you need a more detailed description than this, PM me :)
Once you decide what you want to keep, if you want to make a photo album with very little work, you can upload all the pictures that you kept into Shutterfly and tell it to make a photo album with all the pictures organized by the date taken. You can spend hours customizing, or you can say "Done!" and have it printed. Good luck!