You are working as a full-time software engineer and you think 6 months of answering StackOverflow questions and working on your GitHub profile are going to be

You are working as a full-time software engineer and you think 6 months of answering StackOverflow questions and working on your GitHub profile are going to be better for your resume than continuing in your job? Get a new job. If not your dream job (yet), some job that is incrementally better. Apply for jobs. Interview for jobs. That will teach you a lot more than hanging out on SO.