1. Update your grammar to semi-competent reading level, before dishing out safety advice. It looks very unprofessional otherwise.
2. I started with a 250mW+ 650nm 20X laser. I am fine.
Starting off with ~100mW of 532/520 will be fine. It gives you the clean visibility of a clean green beam, with the safety of not waving around a class IV device.
Specular radiation only becomes an issue when you're in the Class IV range. With blues, it's a "double trouble" scenario. The specular radiation can not only be a blinding hazard, but the overload and intensity of the blue wavelength can cause blindness in the green spectrum. This is why I think I have a hard time differentiating high WL 520's from 532.
The second possibility would be an 80-100mW 450nm. Still a clean, fairly visible beam. However you get that cool blue beam that is unfamiliar to most non-laserists.
I would also recommend a single mode 635/638nm. These are less visible than the blue, but there is still a semi-visible beam. Plus the orange-red color is very appealing.
Just be safe, and if you're doing up close burning, I would recommend glasses. Not so much because of the specular radiation, but moreso because that will get VERY bright. Like looking at the sun on a cloudless day. You'll have a blue-green spot in your vision for a while
Enjoy the hobby!
EDIT: "no such thing as a bright blue without high power."
That has to be, by far, the most objectified and subjective advice I have ever seen. If all you've seen are those red key chain lasers, like myself before coming to the hobby, 50mW of 450 will be very bright. However if all you work on is 10W 532, it will not be very bright at all, relatively speaking.
Please keep your advice,
1. Professional in the grammar department.
2. Scientific. If anything.
