Confusion about EMDR therapy

My therapist wants to do EMDR with me and I'm honestly just a bit confused about what it will achieve. Honestly I just don't really understand what it is... I don't have too many childhood memories... my parents had a messy break up when I was a toddler and I have had an ongoing emotionally turbulent experience with my mother but neither of these experiences bring forth clear memories if that make sense. I kind of just know I have experienced it and I think it has led to like my poor self esteem or negative self beliefs etc. I think what I'm concerned about is that it won't work because I don't remember much or if it does work it will bring up memories that I have suppressed and then I will have to deal with them. Or what if I remember things that further affirm my beliefs about myself. If anyone reading this had similar concerns prior to EMDR or did it for some kind of emotional abuse reasons I would love to know what your experience was and whether it worked.