Yes omg so glad you asked. Alright so maybe you would wanna get a plot where they start from square one, you know like bickering and the whole shabam, and maybe, say they get teamed up or something on a mission with hero (of your choice ofc) and the villains never show up and on their way back, they get attacked and the pro hero doesn't survive. Bakugou blames himself for not being stronger and letting the hero die, but ofc todoroki was there too and let's bakugou know that he is in fact very strong and comforts him. They slowly form a bond over that and the things they have been through bla bla bla happy pappy. A tip on writing from me would be detail
Detail
A wholllleeee lotta detail also I see in stories grammar mistakes and spelling mistakes, Yeah, all that good stuff
Also I would suggest parting the story into small paragraphs to keep the reader guessing.
For now you should try doing oneshots and explore different topics and themes on stories and see what YOU like so you could slowly get an idea of a story you want to develop, or turn one of your oneshots into a story, start from there. I'm sure that if it's your passion and you work hard enough for it you'll become a great author.