I think the question you should be asking yourself, if you do study for the interview and land a job, do you think would do a good enough work to keep the job?

I think the question you should be asking yourself, if you do study for the interview and land a job, do you think would do a good enough work to keep the job? I'd hire someone who delivered software to solve real problems regardless over someone who is able to grind the leetcode stuff any day of the week. Although I'm almost sure studying the fundamentals + system design for the interview will improve your technical skills, but there is a lot more to a software developer than just that.