you should start by reading and watching videos about your new hobby.
to me it looks as though the light was kept too far away during its growing time, both veg and flower, or not enough light was used.
you did get some bud out of it though, so that is a good thing.
buy yourself a $5 30x loupe to observe the resin glands which will tell you when to pick the flowers and dry/cure them.
next grow, keep your lights as close to the plant as you can without burning them.
you should post some basic info here telling us details like: what kind of soil did you use? what kind of light (fluorescent, HID, etc)? What is the wattage of the light? Did you grow from seed or clones? How far above the plants did you keep the light? Did you have ventilation (fresh air) or use co2? did you have a fan blowing on the plants from the time they were small to strengthen the stems? there is much to learn, but for a 1st grow at least you will have some buds to smoke.