I need someone to talk to. Long term depressed and alone. Never asked for help before.

Long term depressed going through a divorce. Don't know where to turn. Out of work for years through my 8 year marriage which went to pieces due to my dumb brain and its predilection to keeping me in a low mood. Tried to concentrate on doing exercise and thinking positively. Was getting myself together but soon to be ex-wife couldn't deal with me anymore and basically put me on the street. Spent 4 weeks couch surfing and occasionally sleeping rough. Have a flat now but also have debt accumulating. Am 36. Have a degree in "Multimedia Art" specializing in software no longer used by the industry. Basically squandered my education in BS degree. Want to get myself together but do not know where to start. Have 8 year old son who I love dearly and see on most weekends and school holidays. Do not know what to do. Feel suicidal often but cannot go through with it due to not wanting to devastate his life.