If you just want to lose weight, you can lift dumbbells to tighten your muscles, which will make you thinner. I used to have thick arms, but I lost weight after dumbbell training, and I didn't lose weight elsewhere.

It will be easier to go to the gym if you have the conditions. You can use equipment.

If you buy a pair of dumbbells at home, the kind with adjustable weight.

Hold the dumbbell in one hand, put your arm up against your ear, bend your forearm backwards and lift the dumbbell, each side 12 times, as a group, four groups a day, in order to practice triceps.