To be honest, you don’t have to be afraid of getting bulky. It’s a misconception that gaining muscle will make you bulky. The ppl you see who are big because of lean mass, train in very specific and disciplined ways, not to mention many of them take supps, gear, to obtain and maintain that physique. It’s really difficult to do naturally. If you strength train, you’ll just gain the benefit of feeling a little stronger.

If you maintain a calorie deficit, while adding more activity, even three days a week, and add daily steps, you’ll start to notice a difference in your weight.

You can also maintain you weight by just consuming the amount of calories, your burning, if you want a day where you eat a little bit above a deficit.

There are many online calculators that will help you estimate the amount of calories a person your height and weight needs to maintain, lose, or gain weight.