Your best source for mentorship is a local, in person mentor. The best way to find this mentor is thru a local real estate group. Either a mentor will be in this group or can recommend one they have personal knowledge of.
in my area I have successfully offered myself as a mentor/consultant and it has been a great experience both ways. You need someone that can evaluate the deal, evaluate the property and what improvements need to be made and can help with estimating costs and getting contractors as well as walking you thru the steps all the way to closing.
With my business, I can either offer my services for a percentage of the profit or as a fixed fee depending upon how much hand holding is needed. A good education is expensive no matter if you learn by trial and error, books and seminars, or thru mentorship. Seminars and books offer the lure of being easy. All you do is give them your credit card number and they will make you rich. Some seminars are good and there are some good books and they may be very well worth what you pay but some are just a gateway to suck more money out of you.
Bottom line find a local real estate group. You can often find them on Facebook or on meetup. Join their online groups and attend their meetings. You will eventually find a true mentor.