Your problem to solve is: ‘what will make my life worthwhile.’ Make it your job to solve that and spend time and money(=stored time) to do so. The alternative job of how to end your life is a poor goal, IMHO.
You can pay someone to care about you (edit: and has the skills to be useful): a councillor or a life coach or a nurse or whoever... Choosing someone is a difficult problem, but it is tractable; perhaps try multiple people in parallel (edit: from different specialities) and pick whoever clicks the most with you.
Don’t be scared to spend money: as a purely financial decision anything that keeps you earning for many years to come would be an insanely great investment (in fact, so good that it is a startup idea in itself that if scaled could get VC funding).
In an ideal world you have someone close to you help you that (a) would take the time to help, (b) can make the time to help, and (c) has the ability to help. However it isn’t as common as it should be to have someone like that available. If you are lonely then you likely believe you don’t have that person in your life already, so paying a stranger is far simpler.
Finally, if you must commit suicide, please do it so that it plausibly looks like an accident. Suicide is devastating to so many people around you, even very loose acquaintances and strangers in your social graph... I have seen the deep effects of suicides rip through my own friends and acquaintances, and it is the caring and vulnerable that are most deeply and often permanently hurt (sometimes they may be on the far distant fringes of the social graph from the suicide). I personally believe you can do whatever you want with your life, but harming others touches their life.
Edit: if you reply with a way to contact you, I myself would share my time with you, because even just trying to help is an interesting challenge for me. I don’t have any training, but I might possibly be more in tune with you than many who do?