My advice (as a current LPN student):
Step 1: Go to your state's Board of Nursing web site, which should have a list of all approved nursing programs
in the state. If you live very close to a state border then you might also want to look at the neighboring state's BON website as well.
Step 2: Using that list, look up all the locations of all the LPN programs and narrow the list down to the ones that are in driving distance for you. If you really want to plan ahead, find all the local LPN-RN bridge programs and research them at the same time.
Step 3: Scour the web sites of those schools for information on their nursing programs; look for information on pre-requisites, admission criteria (and deadlines!), length of the program, etc. As part of this step you may also want to go back to the BON web site and check those schools' NCLEX pass rates.
Step 4: Contact someone at the schools you're interested in for more information and start planning to take whatever pre-requisites you need (get A's!), take whatever entrance exams need to be taken (study and score high!), and plan to have all of your transcripts and application stuff ready in time for the application deadlines.
Now, some generalizations: Most LPN programs are close to 1 year long; most ADN-RN programs are 2 years long; most LPN-RN bridge programs have the same pre-requisites as the school's RN program and require you to take a bridge class, after which you essentially jump into the second year of the RN program. Community college programs are usually the least expensive and usually have the highest NCLEX pass rates, but they're also usually the hardest to get into.