Summarize:

Go to https://www.paypal.com/ in your computer's web browser. If your PayPal page doesn't automatically open, click Log In in the top-right corner of the page, enter your email address and password, and click Log In. You can then click My PayPal in the top-right corner to open your page. It's a tab at the top of the page. You'll find this near the top of the Send & Request page. It's a link on the right side of the page. Doing so opens a window with your PayPal link listed. You'll see a PayPal link below your profile picture near the top of the window. Click and drag your mouse cursor across this link to select it, then press either Ctrl+C (Windows) or ⌘ Command+C (Mac) to copy link. Go to the social media page, email inbox, or other place in which you want to paste the link, click the text box you want to use, and press Ctrl+V or ⌘ Command+V. The link will appear there. You can proceed with posting or sending the link depending on where your pasted the link (for example, if you're using an email service, you would enter the recipient's email address and then click the "Send" button).
Open PayPal. Log in if necessary. Click Send & Request. Click the Request tab. Click Share your PayPal.Me. Copy your PayPal link. Paste the link where you want to share it.