First of all you should inform yourself, don't fall for stupid lies about quick success,
that will just frustrate you and make you quit.
For example all those ads that tell you you can loose your belly with an ab trainer, which is just bullshit, you can train a certain muscle, but you can not burn certain fat.
That is why nutrition is very important, yet gaining muscle is a big part of burning fat, not only because you burn energy during the exercise, but because the growth of the muscles itself, which works countercyclical, meaning the muscles grow when you are resting them, burns energy, but you need to make sure that you can provide the right energy. Also each gained pound of muscle increases the amount of energy you burn in idle mode, the maintenance of muscles costs more energy.
But start realistic, don't start out by being every day in the gym for two weeks and wonder why it didn't really work, your muscles especially in the beginning need a lot of rest, and wanting to much to quickly often leads to disappointment and quiting.
Same with your nutrition, many go overboard by seeing what they should eat and creating a diet for that, the problem is they often end up with very few variation, which is a hard challenge, and often makes people quit it eventually.
Much more important than what you eat, is knowing what exactly it is, what it does for your body, where you should set your limits for it, it may seems like a small step but knowing about nutrition and eating with consciousness goes a long way to a healthy and sustainable diet, from which you will profit a lot more than from q quick diet out of a magazine or something. Be sure you need to change your life, even tho just a little but you need to change it, it is not enough to just do something for 2 weeks, a month or half a year. So make sure to change it in a way you can handle, and once you achieved that go further from there. It will get easier, because once your body is used to hard work, he craves for it, you need it and will not have to overcome yourself to do it, also mistakes are easier forgiven because of the increased basic energy requirements of your body.
I work out in the gym 2-3 times a week, i have practice 2 tiems a week, sometimes gameday on the weekend, and 2-3 tiems a week i do some cardio and endurance training.
And i wouldn't say i got any secrets.