I think if you do a search you will find several goodbye threads where people in their last moments have had witnesses watch them die. The observers have described in detail what they saw in terms of how the person died, duration of death, any visible pain etc. This should give you a pretty good idea of the situation.
Loneliness in your last moment is a terrible thing, i am sure there are people on this forum that will provide company if you decide to go ahead. There may be even some people that will not only reply in the forum but could call you or video call etc but i am not sure if this is against the rules of the forum? Could this be why your post was deleted by a mod?
I hope you find comfort in this community as there a lot of kind people here who are genuinely good and just want your suffering to end.