Trying to build dropdown and when selected to change label on button and once button is clicked redirects to that page on your site!

Need some help with trying accomplish this. I have a dropdown list, the database is setup with a list that shows in the dropdown. A button below that dropdown of list. Here is what I need help with step by step.

Step 1: Button is disabled with a placeholder saying “Select a Option”

Step 2: Once a option from the dropdown is selected than enables the button with a label on button matching what the option is, for example: I selected from the dropdown “The color Blue” and the button enables with label “The color Blue”

Step 3: And then I click that button and it redirects to that page on your site.

How can I accomplish this? If need more details, please let me know.

If anyone can help with this?