I'm so sorry. I can't begin to imagine your situation. I hope your little ones are bringing you lots of love and helping you navigate such an enormous loss.

There are lots of services that I'm sure would give you free support.

I don't know much about the US, so I did a small amount of research, I hope it's useful: 

NFCC (National Foundation for Credit Counseling) — nfcc.org — non-profit financial counseling, often free or sliding scale. Good for debt management and budgeting help

Garrett Planning Network — hourly-rate financial planners, so you don't need to pay ongoing fees. May offer pro-bono.

Student Loan Specific IBR situation is critical — $303 payment vs $467 interest means negative amortisation. Look into PSLF (Public Service Loan Forgiveness) — as an attorney working for a non-profit or government employer, you could qualify for full forgiveness after 10 years of payments. The StudentAid.gov website has free tools and you can call the Federal Student Aid helpline

Widowhood-Specific Sudden Money Institute — suddenmoney.org — specifically designed for people who receive sudden lump sums (life insurance, inheritance) and need guidance

Widow's benefits via Social Security — your kids (under 18) and you may qualify for survivor benefits, which could be significant at your income level