Ok, I will say that I have applied and been interviewed as of yesterday for two federal government jobs. No offers yet, but I am still looking.
I did the same thing with USAJOBS.gov. I used key words and just applied to anything within a 30 mile range-- since in my case that is 3 different states, I guess I have an advantage over someone that is only in one geographical areas.
Follow the application directions EXACTLY. If it says attach a transcript, upload the files-- or you will be considered ineligible.. The applications do have tons of yes.no questions-- usually in the 60-85 question range--(at least in my case). There will be essay type questions too..
Know the GS pay scale. Certain geographical areas pay higher than others so a GS7 in Philly or New York City would pay higher than say one in Cleveland.
The interviews can be long. One interview was 4 hours long, including mock trial, mini-test, panel interviews, fingerprints, training session and four meet and greets. One other was about an hour long with a panel interview and HIGH security... Note to self: ask for permission to go to the bathroom as you enter and not before you come in, or you will have someone go looking for you and have security find you... I did this yesterday, I had no IDEA!
It will take long for someone to get back to you and even longer for the decision process. The interview I had yesterday was something I applied for back in late February/early March.
Training and travel may be necessary as well.