Like I said in my original comment, it's really hard to make the background seamless (as in so that it follows the same light sources/perspective/conditions as the figures, like if the characters have gray shadows it means that the background needs to be one that creates gray shadows or you'll have to re-paint the characters shadows etc) and more often that not it will look bad because you can see that the background is a separate afterthought as the background and the characters contradict each other and generally will crap out the composition. Which isn't to say that a pro artist can't do it, but I'd say you're not there yet.
So, I just want to fully understand. Are you saying this image probably won't look good if I continue the in the direction I'm going? I know thumbnails are great resources for composition/angles and perspective, but I was sitting there one day and was thinking "I want to draw an elephant!" and I just kept going and going and this came out. Thanks for the help, Tinybird. I am so tired of being discouraged with my art :/ I want to finish more things. Even when I start correctly, I still get bored with it and never finish. It's just tiring. I'll keep posting my progress.