Hi there
Learning to fish from a book is all well and good, but I'd strongly advise you to try and get out with an experienced angler..

There is so much specialised tackle out there for the different branches of the sport, that unless you get some guidance you could end up spending money on useless items.

A knowledge of rigs, knots & baits is essential, but so many little things need to be seen to be understood. Things like watercraft can only be learned with years of practice and observation.

Try to avoid doing what many are doing these days, jumping into carp angling before learning to fish for all species.

Probably the easiest place to start is general float fishing for roach, tench & bream..

By all means add to your knowledge from books and the internet, but do get someone to teach you.

cheers
Gareth (40 years an angler)