If you search for the faucet by brand and model you are very likely to find a YouTube video showing step by step how to take the handle off and replace the rubber o-rings or seals underneath that are causing the leak. I personally wouldn’t replace the whole thing.

As an aside, once you get it fixed, a gentle hand goes a long way towards preserving the life of those seals. When you turn the faucet off, just pull the handle gently far enough to stop the water, don’t slam it down hard against the stop. That tends to abuse the seals and then once they start leaking a little you naturally try to just close it a little harder to make it stop and that starts a spiral effect where the seal just gets more and more cut up or squished.