Congrats on first lucid dream! 
Being lucid means being aware of dreaming, and you were, so you were lucid! First lucid dreams sometimes can be pretty short, but they definitely will become longer with practice. 
Also what you did experienced is called false awakening, it's when you 'wake up' in dream and do things you usually do when waking up, they can be pretty confusing, i suggest you to make reality check every time you wake up/get up from the bed, that way you can catch false awakenings and make them lucid dreams. 
And yeah, dreams are often based on stuff that we do through the day and other memories from the past. 
By the way, check out some beginner threads here:
Welcome
Induction Methods and Techniques
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