What do you mean by "join the field of statistical computing"? It seems that everyone who has access to statistical software thinks they are experts in (1) statistical analysis (2) design and analysis of multivariate experiments (3) clinical trials (3) every method known to mankind for doing "statistical tests".
I say this in kindness, suspecting this is what you mean by "joining the field of statistical computing". If you want to be a statistician, then begin by working toward a degree in statistics at a good university. Also, recognize that "statistics" is a very broad field with different disciplines. There's much, much more to this than just "statistical computing". A degree in statistics is not sufficient. Get ready for a lifetime of study and learning.
Expecting to make a career out of using commercial statistical software would be like expecting to become a famous author just because you have a copy of MS Word.
While regression analysis is a method used in statistical analysis, it's just one of many.