TS all the best,

there isnt really any tips or tricks.. just eat right and you've already won half the battle. strength training has proven to increase metabolism in the long run if done consistently (actually a proper diet and cardio helps too, if done consistently haha)

gaining weight and losing weight is just the effect of a consistent eating plan.. if we eat too much and enter a calorie surplus.. it causes us to gain weight, like wise if we eat less than our daily required calorie intake and allow the body to be in a calorie deficit.. it results in weight loss.

change your lifestyle, change your self and your image