Push Up Progression. Everyone can do a push up, and plenty of options are available for your fitness level. If you struggle to get up and down from the floor, wall or bench push ups are a great option. You can also use the back of your sofa or edge of a sturdy table.
Place your hands in line with your chest, brace your core and draw your shoulders back and down. Keep your head in line with your spine and look directly ahead (if on a wall) or straight down. Push elbows back away from shoulder line as you lower down.
Also note: if you struggle with a push up or upper body strength, assess your core strength and stability. Also check for dysfunction. Often, it is a core issue that can easily be addressed with the right training plan.