1) My advisor has been very helpful, from helping me decide which classes
to take to guiding me toward the resources available to
Merriam-Webster defines the verb guide as
transitive verb 2 a : to direct, supervise, or influence usually to a particular end
e.g. Her example helped to guide me toward a career in medicine.
Usage notes: guide implies intimate knowledge of the way and of all its difficulties and dangers
N.B. You don't normally guide a person about something, in the OP's sentence the following prepositions: to, toward, or through would be more appropriate.
Alternatively, consider the verb counsel which means to give advice, as in:
Careers officers should counsel young people in making their career decisions
2) My advisor has been very helpful, from helping me decide which classes to take to counselling me about the resources available.