I have struggled when josh changes the fingering and you start with your middle finger. There has been a couple of lesson hes done that on…Its when I have to fret with my index finger and pluck with my middle for some reason that really twists my brain lol its like it just says nope… I think he did that on one of the octave lessons, its one of the things that really stumped me no matter how much I practiced… funny.
Try looking thru them and see where they can be played easier then the way they are written.
Such as that part in the 2nd bar that goes 5,2. 4,0 The 5 could be an open D on the same string the 4 is played, so its a 2 string with 2 opens. Making it 0,2. 4,0. (different strings, just showing the fret order, not string played)
Also, look to see if there are finger positions (like cords, or not) where you can just use one finger for freeting different strings and frets, while the other fingers can stay still while you cross all over the strings.