What do u do when youve decided you no longer should be alive?

I’m going to do it just haven’t decided when or how yet . i guess Ive always known i would just always kept hoping things would get better . i grew up poor and yet still achieved a 4.0 gpa in high school . I cam close to attaining 3 degrees then ran out of grants and scholarships so had to quit and get a job to live . Got laid off from that job after 3 years and got another one got laid off by them too. my whole life has been about taking care of others family gf’s , my now ex fiance and her son  financially and emotionally and have nothing to show for it no friends my family hates me (except when hey want money) my fiance left me for her ex after i got laid off even though i moved 1500 miles to be closer to er family . ill be homeless by June at this rate unemployment just isnt enough to survive on so why stick around? the sad part is im not even really lonely i can handle being alone always kinda have been , just done with trying so if any of you have any advice on how to do it successfully the first time without a huge mess or it being obvious (dont want to be a disappointment yet again and have everyone know) let me know ill check back often it would be nice to get it done before im siting on the streets of Chicago homeless though so u have 2 months. some of us just aren’t meant to succeed or to be here and before anyone mentions it im an atheist so hell doesn’t scare me