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Not a bad start. Just to tidy things up, I would make the small text all the same pt size.
I'd also make the ring a little smaller. The larger the logo, the smaller the text is in the overall percentage. In this logo, the largest text is only 1/3 of the height of the total height. This means that if this logo was printed at 10mm high, the text would only be 3mm high and the small print even smaller. To fix this, do what you can to make the text a larger percentage of the overall size.