Glad to hear that you have already had success! That is an inspiration to all of us and something that I personally hope to achieve ... thanks for the encouragement.
The FTDNA Haplogroup G Project public page tells us more about your results and the project administrators can discuss your specifics. According to the project public page you are a predicted (red) G2a with twelve DYS marker values and you have been categorized as "G2a3b*--DYS388=13" by the administrators. You will see your haplotype listed on the public page in a large cluster of members with similar haplotypes although you are the only member with your surname.
Don't let the terminology or the science interfere with the use of your results! We don't need to understand how our cars work or our computers run to use them ... likewise we don't need to understand genetic test results to use them. We have plenty of experts who do understand and their knowledge is rapidly expanding ... use what others already know so you don't have to ... I do the same. ;-)