hey mate, good luck, you have had loads of good advice on here...i have not been going very long, and started off with basic kit, cost only £150 and asked window cleaners near me where there was no work, and one kind chap pointed to an estate he was too busy to clean, i door knocked and picked up £50 soon became 600 and never looked back, i saved and bought a good round and canvassed since picking up more and more, it seems the more you get out there the more the ball gets rolling so just stick with it. Just dont under price to get work you will regret it one day, but if you price it right you will never not look forward to going to work, i dont anyway, if the money is bad you will quickly despise your job.
Best of luck