Tricky question...
The "my page" URL is dynamic because it uses the user's ID and username. Your best bet is to use SocialConnect to easily create a "user dashboard" as we do here on joomlaworks.net and in there load the K2 user links that include the K2 user page as well. SocialConnect really is a better component to handle user logins, it's not just for social logins as many believe (perhaps we haven't communicated that feature as much as we should have)...
Fotis / JoomlaWorks Support Team
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Please search the forum before posting a new topic :)