When we were starting to really try and incorporate more fruits and veggies, we used steamer frozen veggies and bagged salads, as time went on we do more fresh and roasted veggies, buy romaine or iceberg lettuce and make salads whatever helps you get more veggies in. I have a bag of frozen blueberries in the freezer to throw in my oatmeal, frozen strawberries are good, too.
We sometimes juice, carrots and apples make great juice. if you have a blender baby spinach in a smoothie with a banana and some peanut butter is great the baby spinach is very mild and basically disappears with the banana and peanut butter, I use vanilla almond milk, some people use yogurt.
Also, some convenience type things are available in stores, apples already cut up and in little bags, carrots cut like crinkle cut potato chips.
Best of luck and keep thinking, more veg...lol