Post good or quality and informational posts, technical like data analysis and awareness like scam busting. I will guarantee that you can get merits and then you will grow up to full member in no time or it could even go beyond that if you will going to continue doing it so and receiving merits.
It is not even necessary you create a topic, you might end up spamming that way. You can easily comment (a sensible one) on already created topics, ask questions on the thread. Trust me, you will enjoy and gain most from the platform