Welcome to the forum. please do pop over to our intros thread and let us know your experience with magick so we get to say Hi and know what level to aim our answers at.
It’s a rule of the forum that everyone has an intro. 
To answer the question, I would say Antharrahu, not because he’s all friendly, he’s not, but because he specializes in bringing opportunities and causing you to rise and build your kingdom on Earth, being successful in all areas.
You’re very first concern you posted was having nothing to do, he will get you something to do. It will probably involve other people.
Antharratu is from the Book of Azazel by E.A. Koetting, so I recommend you get that and read it cover to cover first.
While reading that, before you do anything you need to build your spiritual hygiene, start with banishing and cleansing.
When you are depressed, you attract lesser enties that fed on that, and they will make it worse to feed more: you must get rid of those before using magick to summon, so you don’t get more.