FreudianSlipper is correct, most states are still in the dark ages when it comes to a clinical focused LCSW license. Furthermore, some states have drastically different hour requirements and other stipulations, to the point where there is no reciprocity (can't take your california LCSW to Hawaii).
Generally speaking, you first need to graduate with a MSW, find a job that satisfies YOUR STATE's requirements for duties that qualify for LCSW application (the language can differ), then you need to find a LCSW willing to supervise. This is where it gets murky, some states have really high requirements for LCSW supervision. Some states require LCSW supervisors with almost 5k hours, some less. Some want supervisors directly working for your agency and some can be coming from the outside. Some just require supervision a fraction of the hours necessary. Regardless, gonna have to pay for some of the supervision.
Bottom line, don't worry about that so much now. Absorb all the information you can, don't even worry bout the grades too much, it is all about learning what you can and applying it in the field,trust me. Just get strong practicums, build a strong network, and keep in touch with your cohort. If you really want to get started on the LCSW process now, try and find a teacher who has a active LCSW in the state you want to practice in. They should have current knowledge on all the inner workings. You may find one as well in one of your practicums, keep a look out.
Finally, Obamacare is going to change a lot for social workers. From what I hear, any social work job that involves billing units will require the individual to at least have licensure at the graduate level. You may end up having to take the graduate level license exam with the DSM V instead of IV, but you should have a strong base due to the clinical emphasis. You joined the field during a promising time, I wish you the best of luck.