If you actively want to spread and advertise your business (I didn't go into details), I don't think it would be a good idea.
Letters from newbies with such content are very often regarded as spam.
I went through your posts, you very actively want to impose your services through PM. Following the example of this post.
Hey OP,
I tried to send you a PM but I couldn't so I'll send you my message here.
I think users will complain about you very soon.