Number 1 priority for losing weight should be diet.
Number 2 is cardio and strength training for toning, strength, and fitness.
For Number 1 look into paleo, whole30, keto, intermittent fasting or primal. These are diets/lifestyle changes that will for the most part cut out processed sugar, wheat, dairy and other inflammatory and fattening food groups.
For Number 2, there are a ton of great videos on instagram and YouTube, but I would suggest starting with walking. 30 minutes a day minimum. The more you move, the more you'll offset the calories you eat. If you're eating good foods, and moving frequently, the weight will come off. After walking for a week or two, I would recommend looking into functional movements like squatting, hinging, pushing, lunging and pulling and taking time to learn the moves so you can integrate them at home with body weight and bands or at the gym. Good form means lower chance of injury and better results to the right muscles.
If you have any questions, let me know. I do this for a living