plural-sight is a great source of information. i also use udemy. note that not all the courses there are with the same level , and some of them are not worth the time of watching them, so you should read reviews of the course before taking it.
more than that udemy have a lot of promotions and sales, and you can find courses in funny price (like 10$ - that is something i can invest to learn something new) , put some interesting course in the cart and wait for promoand sale , don't pay the full price.
good luck
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