Courses to get started with computer science

I never had expoture to computers or programming till my second year of college. After I have my hands on my first computer I started exploring the internet for real. In the first 6 months I came to know about embedded electronics like Arduino.They were cool.I started playing with them for a while and I left them. Then I started playing with computers on the cloud(servers).Thanks to [DigitalOcean]() for provifing $50 free credit and [GCP]() for 12 months free trial(I was only able to use it for a week with a debit card since ). I installed apache on the server