You don't need to buy dumbbells at home. Push-ups are great You can do it on your knees. Simpler, but more standard. Stick to it every day. A group starts half as often as you do. It is enough to do five groups in a row every day. It doesn't take two hours, and the interval is 30 seconds. Don't deceive yourself, feel the stretching and contraction of muscles, persevere, and come back to see my suggestion 50 days later. There should be great gains! Believe in yourself, speed can't solve the problem, time proves everything.

I hope it helps you!