Welcome, great to have you here, you will find a lot of support, encouragement and success stories here for motivation.
A couple of initial unsolicited tips I'll shoot your way.
1. "Own" every decision you make in regards to nutrition/exercise. If you eat great for a day, celebrate it, think about why it happened and how to do it again. If you slip up, own the mistake. You didn't eat the bag of chips because a family bought it and it was in the house, you ate it becuase you chose to. Admit it and move on to the next behavior/decision. I find this attitude helps me fix problems, and take control of my life.
2. Figure out how to pay more attention to the diet side of the calories equation. I lost some weight several years ago primarily through being in the gym all the time. But diet is well over half of the equation, and if you don't learn how to eat healthy while doing this process, you might lose weight, but you are very highly exposed to regaining it back (as I can personally testify to). I highly recommend calorie counting through an online tool, helps you stay accountable, see where you are wasting calories, and puts exercise into a whole new perspective (this snickers bar is an extra 30 minutes on treadmill, suddenly the craving isn't as strong
Good luck, check in often to hold yourself accountable.