It helps a lot, it’s faster and a teacher can read your energy, actively help you progress and answer questions on the spot.
On your own you have to figure it out for yourself, it needs more time and effort, but it’s very doable.
Personally, I learned from in person classes with qigong healing teachers, acupuncturists and practitioners in New Jersey USA where I used to live. I also attended several Tai Chi and Tai Chi Chi Chuan schools.
There are a wealth of videos, free websites and books that will help you out with that.
Here are some books: