Backstory: I am in my first job in my professional field. After all my bills are paid, I have ~$1k left over every month. These bills are all inclusive, mortgage, groceries, gas, etc. My job is with a small company, 10 employees max, with no retirement fund. I want you to assume I have no savings. I have a retirement plan that was rolled over when I left a previous job (1/2 pay, not in professional field). I do not know what type, I can find out if necesaary.
My questions are
When should I start investing in retirement and stocks in general? Remember, I have no savings.
Since I already own my home and can safely pay the mortgage and household bills, how much savings is generally suggested before one starts to invest in stocks or retirement?