Hello all iam at a level with apex coding now and was looking for use cases which can actually help me to be as a pro. If some once can help me regards to that will be much appreciated. Thanks in advance

Hi partner, there is a lot of things you can do, there are codes that can be reusable (mainly for test class), I suggest you to do code that could help you in a future and store it in a repository. (yeah CI/CD will be required in a future and it is a good practice, also looks cool on your CV). First focus your path, you only want apex code or maybe also learn about LWC, Aura, VF, etc. If you want to start from the bottom (triggers and helpers) learn about framework. good practices (try-catch, SOQL with security enforced if required, Database.insert,  Database.upsert,  Database.update) there is a lot of things, just pick a path and search for good practices and documentation on everything you need.