Instead of using linktr.ee, I would recommend creating a links page on your claimed website domain. That way you can track the data and you are bringing traffic to your own website vs a third-party website first.
However, when I'm creating pins, I always link directly to the post or product that I show on the pin. On idea pins though, I will add a call to action for them to click the link in my bio to find what they are looking for.
I'm not sure what you mean by pinners having different names? Are you talking about Pinterest account names?