ake, a lot of would be guitarists are never told it is not necessary to play all six strings at once.have you tried tuning 1 string high e down to d , you then have four strings of banjo ,dgbd
the next move is to tune high b up to c easier if you have medium light or light strings this gives you banjo sawmil tuning, you arethen good tuning for american tunes and modal tunes ,my approach next would be to play ther tune on 432 strings and use 1 string as a drone , this means you have to go up higher on 2 string for the melody,[ i am going to make a wee over simplification] this is the basis of roscoe holcomb banjo style thumb melody[ not to be confused with thumb melody bluegrass, which useses rolls to fill out harmony sound]