Step 1. Start collecting images and clips.
Step 2. Start collecting sources for images and clips.
Step 3. Cultivate a network of like minded people who will share images and clips they find and/or have collected.
Step 4. Periodically try to organise the images, be surprised at what good taste you once had.
I've collected mine from tumblr, Insta, r***it, Telegram, now also Lemmy, and more. The trick is to save the clips/images and not delete them :p
Oof, living the saying "a beautiful body will make anything look good"