I completed my10+2 and degree from Distance education through osmania university..But i having one backlog in final year and my age is 38yr.
First, If you have a back log then you won't eb eligible to apply for law entrances any where.
Second, any specific university you want to know the admission process for law, there are age limits too. Like in DU, the maximum age criteria is 30 years.
Let me know if you want to know any thing more specific about the LLB course.