Many accredited law schools offer part time programs (i.e. evening programs) that usually take an extra year or two to finish. They tend to be the least desirable law schools (so don’t plan to get a fancy job on Wall Street, more likely you’ll need to hang out a shingle). In general, except for the elite law schools, you should go to a local law school (one in the state or region you’ll seek to pracitice in). Pre-Covid19, any sort of correspondence or online law school was largely prohibited by the agencies that license lawyers.