Hi

I just finished with the fingerpicking series you mention. It is great! Lisa does show you which strings to use when fingerpicking a chord so maybe you just haven't gotten there yet. There are many variations of the 4 step pattern too she will go through, each pattern with different chords/bass notes.

I also found a new fingerpicking lesson, it is one you'd go to after finishing Lisa's series. It is by Mick Leonardi and called The John Prine Artist series. It is quite enjoyable and easy to follow.
Can't wait to finish it.

Based on your user name... are you military? if so, thanks for your service to the country

Good luck!