There a lot of tutorials on youtube namaste javascript is a good playlist for js and for react mongoDb you can read up their official documentation and for node try to build some basic fs module projects you will get the hang of it. fullstackopen.com/en this is also a great site.
Sagar Singh
Hello! I am a student and just starting my coding journey.
your journey is very inspiring , you faced problems but kept moving forward anyways and it paid off eventually. Thanks for sharing your experience.