Define a plan what you want to reach the next.

https://www.indeed.com/career-advice/finding-a-job/what-to-do-after-accepting-job-offer

Set career goals

https://www.indeed.com/career-advice/finding-a-job/what-to-do-after-accepting-job-offer

Learn and develop your skills, seek a guidance if you need

Expand your network

Document you achievements

https://www.indeed.com/career-advice/career-development/how-to-track-accomplishments