Well, I don't know much about flipaclip, but I can give you some general pointers;
1: The pacing is terrible. Things happen extremely quickly, and it's difficult to read the text on the screen in the split second it is there without pausing.
2: From the first point, if you are trying to convey information about your OC, having blocks of text is probably better in a format outside of video, like an art portal submission or blog post. Slow the pacing down, and add some kind of audio. Either tell a story via narration, or animate a story or pieces of it.
3: Most of your drawings are pretty basic. Right now the entire video is JUST the visuals, and several frames are just scribbles. Some are harsh white-on-black frames, others fairly dark lines on a harsh white background, and some are very dark with dark blue lines that aren't as clear or easy to pick out. There's a few frames of animation with the top hat-character (?) swaying back and forth, then it stops and opens a singular red eye on the center of the top area. That's not too bad, and has some potential to be visually striking, but then the arms (?) seem to change in shape from claws, to paddles, to hoops, to text, to a low-visibility frame where they're just noodles. You want some kind of consistency in your drawings first, then you can start worrying about smoothness.
You don't need to improve all of these at once, but if you want to show people something and receive a positive reaction you need to start from the top of the list and work your way down. Right now it's just 6 seconds of garbled pictures, if I look at the frames individually I can make out an attempt at a story, but it's missing a lot of chunks. Short and snappy can be fine for action or comedy, but if you want to share some kind of lore or deeper meaning you need to be a lot more deliberate.
I'm not trying to shit on a newbie, but if you genuinely want feedback I can give it. Animation is very difficult. I don't know what other options you have for software or tools.