A lonely person wanting his only fun back

Im a 20 year old lonely high school student on extended studies going on part time job to help my mom with bills and debts and I cant afford to spend the money i make on anything sideways if we want electricity and water at home. but the only source of fun in free time i had, which was pc broke. it was an old pc that already showed signs of retiring sooner or later. I know it sounds like pointless and no life for others, but for me this is my life it keeps me sane and enjoying myself, those who also have it like this for sure shares my feelings and can emphatise with me. Please help me.This is for full setup + small help of debts for mom. Help me get first good christmas