Filler in my tear trough area or a fat transfer ? Woman, 21 with undereye fat loss. (Photo)

Should I undertake a filler treatment before a FT procedure? Or the latter only (longer lasting)? Student here, so I can't spend on various costly procedures. I'd rather save up for the one, more costly FT procedure. Where is the FT from? I have a defined, low fat vol face so it'll be hard to extract fat from other facial areas, nor would I want to. Which is more risky (scarring and allergic reaction etc)? I'm worried about filler injection into a blood vessel and thus, blindness. Thank you!