There are literally tons of good sites with lots of good information. First off, I would recommend a distro like Linux Mint Debian Edition. This is good for new and intermediate users alike. Manjaro is more for an intermediate to advanced user. What I would l do is install Linux Mint Debian Edition and then using your favorite search engine use the keywords “introduction Linux command line bash” You could also use YouTube. There is going to be a lot to learn and it may seem overwhelming.
The reason I am steering you to Google to find an intro course is not to be a jerk or elitist but to help you out. The best Linux system admins/engineers are masters at research. You only get better at research through practice. Seek out a good intro to the command line based on Linux Mint. Complete it, let me know what you learned, what you struggled with, etc. From there, I’ll help you chart a course. You’ll learn to love the command line. I do 90% of my work in a command line. Know the command line, Become an expert.