Let me give you some tips.
Start from here :
https://www.edx.org
This is free platform for online education and certification provided by the world leading universities and organisations like MIT, Boston university, Linux Foundation etc.
The courses are free, you pay only for certificate /world wide accepted/ if you want one. You can finish the course without buying the certificate.
I can recommend two courses i've taken.
Introduction to Linux : https://www.edx.org/course/introduction-linux-linuxfoundationx-lfs101x-1
Blockchain for business :
https://www.edx.org/course/blockchain-business-introduction-linuxfoundationx-lfs171x-0
I see they have more new courses for Bitcoin and cryptocurrencies. I guess they deserve some attention too. Just search the site.
Good luck
When I clicked on the thread this exactly the kind of information I was hoping to find. Thank you for sharing this resource or us. I live near Vienna, Austria so there probably would be school/college course about Linex available, but for me too complicated to attend. Between full time shift job and little daughter I have spare time mostly on evenings, that’s why I believe this is the perfect solution for me 👏 thanks again 🙏
Update: already registered, enrolled to Linux introduction and ios app downloaded 💪