No worries, EvilRaccoon. Adding a tail will be fine, I think will be add strongly to the overall look of the character and communicate to the audience that this is indeed a hybrid human-animal you see before you.
What Meta says in regards that spiriting and pixel art in general is a process that takes a lot of effort and practice to get good is true, however that's what this forum is for. So long as you take in the constructive feedback the people provide to you and then apply it to your work, as well as learning WHY you're doing it, then you'll definitely improve leaps and bounds. If anything I'd be glad to help out if you have any questions you want to shoot my way.
What Meta says in regards that spiriting and pixel art in general is a process that takes a lot of effort and practice to get good is true, however that's what this forum is for. So long as you take in the constructive feedback the people provide to you and then apply it to your work, as well as learning WHY you're doing it, then you'll definitely improve leaps and bounds. If anything I'd be glad to help out if you have any questions you want to shoot my way.