Cancer, Treatments-Pain Mgmt-Final Arrangements

My name is Christine, I'm 46 years old, have 2 adult children and 2 minor children, 4 grandchildren,  5 Stepchildren & 5 stepgrandbabies not including 1 on the way. I am happily engaged to a wonderful man who I'm extremely proud to have & deeply in love with.. 

Unfortunately I was diagnosed with malignant cancer in my lung in August of 2018 in the midst of other major issues, I underwent surgery,  chemotherapy and radiation.  

Unfortunately it has metastasized to stage four lung cancer that has spread to my lymph nodes, blood stream and adrenal gland..
surgery is not an option, Palliative care and Pain management are my options for quality of life care... possibility paired with chemotherapy. 
I have lost quite a bit of weight during this ordeal and I am in a lot of pain and sometimes it's excruciating which causes nausea and severe cramping
 I have trouble standing, walking, doing laundry, housework & making dinner.. I have not been able to drive in approximately a month or so... 
Epsom salt soaks and a heating pad seem to relieve moderate cramping.. short term!
Other therapies are needed for relief of pain and help with sleeping, hygiene needs, financial assistance.. etc. 

I am not able to work and haven't been for two years now... I'm on disability now in which my fixed income is ONLY $459.00 per month.. AND no additional support.. I don't have any will or final arrangements in place... no details of my final wishes, requests or wants.
No life insurance policy. Nothing to ensure that I am not a burden to my loved ones... That I can not struggle more than I currently am in my final years, months or whatever it may be... 
I don't want my death to cause any financial debt nor baggage to my loved ones in any form. 
I wish to be cremated with an open memorial service for...  limited to only family and close friends during  eulogy, sharing, etc. 
I am catholic and my fiance is my rock, best friend, confidan, my lover, my cheerleader, my support, my soulmate, my lifeline & my everything. He has been more than what I ever imagined as a gosent lifelong partner who found me; Our 3 yr Anniversary is January 8, 2021... he has carried a tremendous load during this entire process, took a year off work and never left my side during my first round of treatments of chemotherapy and radiation up to and including every single one of my appointments and follow ups... day in and day out he keeps me tucked safely under his wing & treats me with such care, compassion, love and affection.
He hides his emotions, masking his fear in turn putting more pressure on his shoulders. I hate to see him withdraw, worry, stress to financially figure out all the final arrangements and details..
I hate knowing that I have terminal cancer and I may not be here to comfort those who are grieving 
I hate feeling cheated on time now that I have finally for the first time in my life found a forever soulmate who is also feeling cheated amongst a many other things..
I am still in good spirits 
I have hope, I am a fighter, I am very terrified,
I really could use any and all the help you are able to even if it's the minimum amount I am forever in your debt. Grateful to your help in the fullest. 
I don't like asking for help with such things as finances and final arrangements but when in the blink of an eye... life takes a turn for the worst all I hope is that in this tragic situation I can achieve a unity that will make this process a little more easier... so please please anything you can do I know God will take care of you in return..