what to learn more along with splunk to make my profile more strong ?
1)Any tool which can help to use Splunk more efficiently?
2)Any Programming language?
3)Any Certification ?
surely Certifications, but also programming languages could be useful, aniway certifications and continue practice is the way!
Make object oriented programming languages as your priority. Like Java, Python. There are many websites like Hackerrank, Leetcode that can help you in this aspect.