My advice would be to seek out a coach/trainer to help you. Everyone needs help in the beginning, and maybe you could even set up some lessons.
Hopefully your instructer will advise you to use a snaffle, since you are a beginner you may rely on your hands for balance or clutch the horse's mouth or something, but I obviously don't know you and that would be for your trainer to decide ;)
And I'd like to say welcome to the forum! You found a good place to ask theses kinds of questions!
Every great dream begins with a dreamer. Always remember, you have within you the strength, the patience, and the passion to reach for the stars to change the world. ~Harriet Tubman