You really need faster glass and probably two stronger speedlights as well as a second body and extra batteries etc. Can good shots be had with your equipment? Yes. Will it handle ALL of the environments you will encounter? No. I suggest you attend some weddings and practice with your gear. That way you will find out for yourself what you need to add / change. Perhaps find someone who cannot afford a photographer and offer the shoot for free to get experience.
Don't let my comments discourage you. Continue to research and
practice and go after your desires.