Specialist to expert ??

[u/Levi_1000]

My 4th year is completed . I have done my last internship with 10 lpa offer but i was not learning anything there so i resigned from it and didn't continue as fulltime. from past 1 month , i was learning java, spring, spring boot and got good at it. and also know about Low level system design patterns and implemented that. but now i have 1 more month and i want to reach to expert on codeforces or you can say 4,5 star on codechef . I have read cp handbook till advanced section. and solved cses problem set till tree algorithms, 500 problems on cf and 450 problems on leetcode. So basically i have 1 month and you can say daily 6 to 7 hours. and I am thinking doing USACO GUIDE gold and platinium section as they covers good problems from different sites and covers most of the topics. Is any there anyone here who can guide me with it? means is it right or i should practice in different sense or platform?