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Yes! in fact, it's a great way for you to learn about weight training and nutrition, as you'll have an very experienced professional teaching you right from the start. You will actually progress faster because you won't be "unlearning" any bad training habits!
No, Mandie has her own private training studio. She prefers to train clients in-person to be more hands on and effective, however if you have a home gym she can provide virtual training sessions for at home workouts.
That all depends on you and your goals! Mandie will provide you with all the "tools" to reach your goals, but the time and effort you put in will directly impact your results. In addition, the knowledge she will provide you during your training sessions may greatly assist you with other health issues you may be facing.