a.) Get idea.
b.) Google (I know) image search for just the right pic or gif.
c.) "Save pic as" to hard drive of your own puter.
d.) imgflip.com. "make meme", "upload your own image", "upload image from your device", work easy to use text boxes, adjust text to suit your artistic and comedic eye, copy link (bottom choice).
Paste url to reply box on FR. Use proper html and...
BAM...instant meme. Five minutes or less if you're quick.
Eeezy peezy, lemon squeezy.
Bagster