How to Github

git workflow

checkout to dev and pull latest changes
create feature branch from dev branch
write code, commit frequently, push changes to remote
create pull request
review pull request, request changes if necessar and implement requested changes
merge to dev
delete branch

If your knew to git here are some good ressources to get to know the basics:

code formatted?
unnecessary comments removed?
printout statements removed?
If you made backend changes: Did all tests have passed? Do you need to adjust some tests or write knew ones?
If you made frontend changes: Did you test the UI on different devices/ browser (firefox, chrom, iphone, android phone)?
Is your code easy to understand or do you need to insert some comments?
explain the issue for the reviewer and your steps to solve the issue => makes it a lot more easy for the reviewer
label your pull request (frontend/ backend/ testing/ styling/ sql/...)

Bevor starting a knew ticket everybode has to look at the current opened pull requests and decide with the help of the labels what you can do (If later you feel like this is to complicated for you that's no problem you can always add a reviewer later)
pick out a pull request and assign your self so that no two people work on the same ticket
pull remote branch and test it
review line by line and add comments in github if necessary
If you have problems of understanding ask for a code walkthrough with the author of the pull request, if you are still unsure you can ask a second reviewer, ask for help on dicord
If you have questions/ problems that you want to assign for everybody ask on discord, if you have small questions that the author can answer ask directly on github to keep the conversation at one place