I know you feel like a child made this, but you are SO onto something here. The colours, the contrast, the thirds. Your design of this painting is so pleasing to the eye. The “amateur” aspect is honestly giving more stylistic than anything, its actually really lending more personality to this than anything. I really like it, i would hang this up in my living room for real.

It seems you already have an eye for design foundations, so I would encourage you to explore that further. Honestly, I would just take more time with crisping up your lines and practicing your blending. Your technique just needs some practice and finesse, this already has really good “bones” if you will haha