you comment that you stated your thoughts awkwardly to your mom but that she did attempt to listen but not follow thru 100 percent. maybe using an I statement would communicate your feelings better. they are a way of talking your thoughts in a nonjudgmental way. writng them out first is sometimes helpful. you dont want mom to feel attacked, that way she will be more likely to meet your needs. they follow a general format.
I feel.......express a feeling
when......state the situation that is concerning you.....do not say "when you" because this makes others feel targeted.
because..........how the issue impacts you
what i would like is........state your needs

i feel frustrated
when people talk to me when i am trying to complete my homework
because it makes it really hard for me to concentrate
what i would like is for conversations to wait until i have my work completed.

so if she gets upset and says you are attacking her for talking to you, you are able to say that you said people, as in all people, not just her. that you need uninterrupted time to get your homework done. can she understand and allow you that time?