Fish would be easy.
if bait = yes
then change variable fish 0 -> 5
if fish = 0 print "Nothing"
then change variable line 0 -> 5
if line = 0 print 'The line snapped"
if line = 1 print 'The line snapped"
if line = 2 print 'The line snapped"
if line = 3 print 'The line snapped"
if line = 4 print 'The line snapped"
if line = 5 print 'You caught a fish X" change item add fish X
if fish = 1 print "You got a bite!" then change variable type 1
then change variable line 0 -> 5
if line = 0 print 'The line snapped"
if line = 1 print 'The line snapped"
if line = 2 print 'The line snapped"
if line = 3 print 'The line snapped"
if line = 4 print 'The line snapped"
if line = 5 print 'You caught a fish X" change item add fish X
if fish = 2 print "You got a bite!" then change variable type 2
then change variable line 0 -> 5
if line = 0 print 'The line snapped"
if line = 1 print 'The line snapped"
if line = 2 print 'The line snapped"
if line = 3 print 'The line snapped"
if line = 4 print 'The line snapped"
if line = 5 print 'You caught a fish X" change item add fish X
if fish = 3 print "You got a bite!" then change variable type 3
then change variable line 0 -> 5
if line = 0 print 'The line snapped"
if line = 1 print 'The line snapped"
if line = 2 print 'The line snapped"
if line = 3 print 'The line snapped"
if line = 4 print 'The line snapped"
if line = 5 print 'You caught a fish X" change item add fish X
if fish = 4 print "You got a bite!" then change variable type 4
then change variable line 0 -> 5
if line = 0 print 'The line snapped"
if line = 1 print 'The line snapped"
if line = 2 print 'The line snapped"
if line = 3 print 'The line snapped"
if line = 4 print 'The line snapped"
if line = 5 print 'You caught a fish X" change item add fish X
if fish = 5 print "You got a bite!" then change variable type 5
then change variable line 0 -> 5
if line = 0 print 'The line snapped"
if line = 1 print 'The line snapped"
if line = 2 print 'The line snapped"
if line = 3 print 'The line snapped"
if line = 4 print 'The line snapped"
if line = 5 print 'You caught a fish X" change item add fish X
Or something like that.
The mining one could be done almost the same.
The smithing one is also easy.
if iron < 0
if rock < 0
iron - 1
rock - 1
change item rock sword.