Thank you so much for your question. Please have a look here on the documentation to know how to change the text and link of Read More button. But if you want to put your own link on that Read More Button, please select the Custom Slider and Make the custom Slider including, title, tagline, button text as well as link from the field. Have a look here and select the Custom slider from Slider Selection From
Hope this will solve your problem. If you have any query, let us know.