See to be a freelancing full time content writer, it will require time. Its not like that you have registered in some website and you will get projects. So to build a brand value in the field you need to invest some time. Now there are many freelancers who earn may be more than a assistant professor per year but that takes time. As a result, if you don't have any economical issues then you can go for the freelancing but it won't be safe as that of the Assistant professor jobs. For most freshers in Freelance the payscale may be around Rs. 1.5LPA to 2 LPA where as for a assitant professor the payscale is above Rs. 6LPA (depending on the college but in general its greater than 6LPA for the probationary period and after that it increases considerably).

Now I would say if you aspire to be a vlogger or a content writer then you can do it along with your Assistant professorship job. I would say you should do some content writing internship and gain experience and then if you fill then switch the field. Now if you don't have any economical issue then you can go for a full time freelancer but getting freelancing to the pace will be time consuming. So as per my opinnion I would recommend you to go for the Assitant Professor job and then do the content writing as part time and gain some experience and then approach the industries, this way your value in the industry will increase as a content writter.

To know more about content writer as a profession, visit the link below:

https://www.careers360.com/careers/content-writer

I hope you got my point. All the very best for your future endeavors!