Your garden is looking good, you may use beds on each side for annual flowering or perennial plants otherwise its looking great and the best thing I have spotted in your garden is H on the wall I really liked it
Hamad
Good start. Yes make a bed on sides of lawn and put some plants in it. Also plant some good vine near the dry tree and train it to climb it. You may plant two different vines to get blooms throughout the year. Best of luck.