Self-programming the key fob is not a very complex process unless your car model is just out of your understanding. Many car key fobs are complicated to reprogram, so you should not try doing it yourself. You can call a professional to do your work, and a professional locksmith knows your locks and keys more than you.
Typically the reprogramming process can charge you up to 200 to 500 USD. Additionally, you can search for professional locksmiths that offer discounts on every service. ASAP Locksmith is one such destination where you can also get exciting offers.