Self learning vs Extra courses

when you guys wanna learn something
it's really common for people to learn from youtube

yes
for something you can really do it this way
but i think it doesn't really work for me
as spoon feed is always better

for language
do you really get the correct way in pronunciation?
are you sure the way you pronounce is correct?
and how about some special cases?

then sports
there's something you really did it
but is that the correct way of doing it?
if not, where's the mistake?
and how to correct them?
after you've corrected yourself
are you sure that they're perfect?

what i personally think is that
if you are going to learn something new
it's always better to get a coach or tutor to guide you
that's how you're going to identify your mistake

self learning without any guidance won't work for me
i will lose my motivation on the thing i wanna learn
and you won't know how good you are too
so i prefer attending some formal lesson instead of self learning