Hello,
Firstly, congratulation for completing masters in Sociology.
There is one of the most famous eligibility tests for lectureship for which you can apply to become an Assistant Professor.
I'm talking about UGC NET (University Grants Commission - National Eligibility Test).
The National Testing Agency conducts UGC NET Exam to select the candidates for the post of Assistant Professor or for awarding Junior Research Fellowship to the deserving candidates.
UGC NET also conducted for Sociology subject. So, if you want to appear in this exam, then get the complete information from here - https://scoop.eduncle.com/ugc-net-sociology-exam
The National Eligibility Test is conducted twice a year. So, you will get two chances to clear this exam in a single year.
There is no age limit to appear in UGC NET for the post of Assistant Professor.
I hope this information is helpful for you.
Best of Luck!