Add lateral moves by doing side lunges or shuffles in your warm-up. for example, and incorporate rotation by throwing cross-body punches while walking. Weight lifting and exercising with stretchy resistance bands are examples of resistance training activities. As are exercises like pushups in which you work against the weight of your own body.
Start with light weights and perform a set. Continue adding weight until the exercise feels challenging but you can do the desired number of reps with good form, which includes moving slowly that you’re using muscle and not momentum to lift the weight. The last rep should be difficult, but not impossible, and you should be able to keep good form while doing it.