Was in the same boat some time back. I lied about everything, practically my whole CV was stolen, I'll put the correct name of the firm i interned at but the tasks that i have written would be corporate law related tasks, copied from here and there. Linkedin is useful for stealing stuff, you can steal from other people's profiles, many people put what work they've done in the description. So a little bit of stealing, a little bit of inflating and everywhere inserting some generic agreements and contracts like service aggreement, transport agreement, MOA, SHA (i write that i have done drafting and vetting of these).

Also in the mean time try and read up on whatever you're claiming to have worked upon. I have done the same and so far it has worked out fine.

After this, once i got a corporate internship then i worked as much as i could and tried to get actual content for my CV and then I just spread it out evenly throughout all my internships and reduced the lies (thus reducing risk of me getting caught in an interview). At this point almost all my lying is over, some minor stolen portion might still be there but now i have been able to get enough corporate internships to get genuine real content for my CV.