I don't know what your body fat rate is.

If the body fat is low, it is easy to practice the outline, maybe 1, and it will come out in 2 months.

I guess your posture is not right. If the posture is wrong, it is mostly the triceps and back, not the chest muscles.

Your diet should also be adjusted to gain muscle. You can't practice it by pure practice. You can practice 3 points and eat 7 points.