I am sorry to tell you this, but there is no way this ends good. You just understand too little and have too many problems. You can start reading and learning, but by that amount of stuff that is falsely configured, i won’t be the one writing a guide of about 100 points to follow. I can do 2 things for you: give you a general recommendation and listing some of your potential pitfalls, so you can start searching, if you want.
The recommendation is simple: as a noob user, stick to default settings. And do not change stuff if you do not understand it at least partially. Moreover, Manjaro and arch are distros that require a minimal amount of learning/reading tutorials, wikis, forum etc. I you do not want to do it consider switching to the the ubuntu zoo.
So, what i see from that screenshot and post:
- OBS is in the repos. Why do you need to get is from git or AUR (if you have absolutely no idea what are you doing)
- why do you bother with AUR at all as a noob user? There is a big fat disclaimer in the settings
- jdk-doc does not seem to be a dependency of anything, it is documentation. And not a dependency of OBS
- actually, OBS does not need java at all
- are you serious with trying to create your own package (why?) and not knowing how to satisfy dependency
- in the log i see the community repo…so you don’t read announcements and manage the pacnew files
- etc…