I am planning to start out with Magento 2. Could you please advise me on the first steps of transition from Magento 1 to Magento 2? I have quite little experience with Magento 1 development, but judging by M2 code, everything seems to be drastically changed. Can you suggest me to study any trusted, relevant resources?
Also, I would like to know how the basic principles have been changed, I mean: catalog, products, quotes, carts. If someone can share the experience of migrating from M1 to M2 ( the popular issues and their solutions) it will be very useful and I will be highly grateful.
P.S. I have already installed M2 and it has not caused any issues. I am highly interested in the extensions development and customizations.