What can I do to be able to contribute to the forum?
Anything that you see right and can benefit another person on the forum and most especially about bitcoin or any other related aspect but must carry a semantic taughts, information, education or insightfulness whereby anyone coming across your post will always be grateful with such an encounter upon your threa, but you will have to acquire a good know about any aspect you're willing to make a post about.
Is it by reporting fraud, cheating, plagiarism or do I have to make a good post so I can be called "your contribution is great on the forum".
There's no specifications in this aspect, you will be the one to discover which area you're good at and could present your nest image representation to benefit others, as a matter of fact it's your choice to decide here which best derines your expertis.