Should I have a talk to my mother about this or just try and forget?

Hello ... First and foremost thank u for taking the time to answer this ... My question is I haven't talked to my mom in ten years we just started to talk .. She basically abandon me sent me away .. Long story short I wanna just forgive her and move on . I'm the one who took the first step she didn't .. I wonder if she even cared about me the ten years. Was gone ... Basically she said sorry fr abandning me but the reasson she did so was because she couldn't give me the life I needed so she sent me to my grand rents .. Sounds ok but if that's the case why didn't she even call ??? She had my other bro and sis and she kept them she didn't give them away ... There's still questions I need answered I feel to move on ya know ? But I'm afraid if I ask her shell get defensive and what not ... I just wanna heal I don't wanna argue I'm not angry still sad tho ... Should I just move on ? What to do ? I wanted to talk to her before about this bi she just sayd no ... Bcus she doessent wanna go around in circles anymore she said sorry and that's it ... I don't know how to feel about this right now . I was with her yesterday or Mother's Day and it honestly made me sad because my other bro n sis were there and she spent evey mothers day with them and never even called me /.. I tried to be happy but again the questions arose .