Answer:
1.) Do research
It's important that you do research instead of diving in head first. See what diet works best for you personally.
2.) Consider ketosis
Ketosis is a fat based diet that trains your body to burn fat for energy instead of carbs, it will help you to lose weight faster and healthier. (Remember to do research, I am not a professional, make sure that you are still eating enough)
3.) Exersize
Try to stay physically active, but not to the point that you are always tired.
4.) Have a positive Mindset
If you don't stay positive, you won't have a positive outcome. Remember to make sure that you never say, "I can't do this" or else you won't be able to. You can do this!
5.) Keep a steady pace
Remember to go at your own pace, and slowly increase the difficulty of your workout sessions every day.
6.) NEVER, and I mean NEVER starve yourself
Starving yourself deprives your body of the resources and nutrients it needs. Your body will be so food deprived that it will begin to eat itself, which will most likely cause long lasting health issues and heart problems.
7.) Be consistent
Don't ever say, "Well, skipping working out/eating healthy for one day won't hurt" because it will throw you off. You can have a small treat every once in a while, like a scoop of ice cream or a little candy as a reward once a month or so, but if you have pancakes for breakfast, a burger for lunch, and doughnuts for dinner, or constantly eat unhealthy things throughout the day, that isn't okay.
8.) You can do this!
Remember that you can do this. I believe in you!
Good luck!