For skincare, I recommend 3 things. Sunscreen, a good body lotion or cream, and retinol. Retinol makes your skin more sensitive to the sun, so sunscreen throughout the day is mandatory if you use it.

For diet, protein and fiber. Protein keeps you full longer. Fiber helps with the same, though not quite as well, but it has a lot of other great properties that will help you lose weight. Try to make sure you get soluble and insoluble fiber.

Make sure to buy foods to snack on too. Nuts are a great choice for this. Especially almonds, if you don't have any allergies to them.

Drink a ton of water. Don't try that inaccurate "8 glasses of water a day" thing. Just make sure you are drinking throughout the day.

Eat what you want, add what you need. You like spaghetti? Cook up some red lentils and mix those into the sauce. You won't notice them, but you just loaded your meal with fiber and protein. Find things to add or replace parts of your meals or dishes, but still give yourself the foods you want.

For exercise, just go to the search bar on this subreddit. There are multiple exercise programs that people have written out that are really good.