Read, read, and read a lot. Terry’s advice is spot on.
Buying from an unknown source can be risky. Just ask me. I first had nucs booked early with someone that never materialised. By that time I was late to order from the commercial shops. I ended up buying from some randoms on gumtree and I’m very disappointed. One nuc was unmaintained. The other had a totally empty frame and just a few bees, and is now struggling.
Ideally, get to know your source and make sure that if there is a problem, they can address it.
The “mentors” I approached in my area were way too expensive to justify the expense. At the end, I’m just chimping along, and keeping my fingers crossed.
I read that book a few times now I think. It is good to start with but I’m realising that is nowhere as comprehensive. I’d say borrow it from the library. You can also borrow it as an eBook.