Absolute best thing you could do is to go to a reputable archery shop and get them to look over the bow to check if it is set up properly and is the right draw length and poundage for you. They will also ensure your arrows match your set up so everything is safe!
While you are there, it is quite likely you might pick up some good pointers from the staff there and/or some other archers that may be there.
Welcome to the addiction we call archery! Have fun and be safe!
Norm
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