I’d like to get more comments on flickr for the photos I take. I’d like to take some stunning photographs.
I’d like eventually to be able to sell prints of my photographs.

Some easy (!) steps:
keep practising what I’ve learned on my course
make maximum use of the camera and lens I’ve got – find out what I can really do with them.
take every opportunity to take an interesting photograph, don’t feel embarrassed at whipping out a camera wherever I am.
taking a fantastic shot and posting it to flickr and it making it to Explore
making maximum use of tags on my photos so people can find them
consider joining a photo club of some kind (online?) so I can get some constructive critique
consider showing prints at amateur gallery opportunities
look into selling photos to stock galleries
talk to the professional photographers where I work and get tips
(alternatively, enjoy the hobby for me and my family and stick to the day job!)