Speaking up for classes!
There are many different learning styles (some say four and others twelve and so on) - but the point is that some people learn better from a book, others from hands-on trial and error experience and others from classes - and even then the teacher's style of teaching may work for you or not.
I often say I can teach a person in one class what took me nearly seven years to learn about reading the cards. In fact, I can have newbies reading the cards with just one 15 minute exercise.
On the other hand, you can study and practice tarot for a lifetime and still feel there is more to learn (like me).
I've taken close to a dozen in-depth tarot courses (of 10 to 12 or more weeks) and hundreds of workshops and lectures. A good class is well-worth it. Even a bad class will show you all the things you don't ever want to do.
I find I remember spreads and processes better when I learn them in person from someone. I also find myself repeating in readings "catch-phrases" that I picked up from a teacher—even more than those I read - partly because I got a deeper sense of the significance from the body language and empathic imprint. I felt it to the core of my being. A good teacher can impart this.
A live (or even internet/chat) class gives you other people to talk to and practice with—you'll find plenty of variety. The energy and enthusiasm plus responsibility to learn the material will keep you going long after you would have gotten stuck by yourself. A decent teacher will teach what they know and do best so, even if it's not "your way," you'll know what that method looks and feels like. And, being forced to do something uncomfortable, takes you past your normal limits, expanding your skill range.
I once took a class from a teacher who would read a Celtic Cross in about three minutes and, if she didn't like the outcome card, would put it down as Card 1 of a new Celtic Spread. Sometimes she'd read three or four spreads in a row in under ten minutes, trying to get an answer she liked! Watching her, I determined I would stick with a single Celtic Spread (no clarifying cards, either) until I got it, and I've never regretted that decision. I also got one or two very helpful techniques from that same teacher.
Suggestion: When you don't like or agree with what a teacher says then ask yourself why and what you might do differently. Take notes in class on what other possibilities exist, different than the one being taught. I've gotten some of my best material this way - and it's uniquely mine!
Mary