Just Signed Up on Reddit - Any tips/tricks/advices on how to get best out of it and be engaged?

Reddit is an underrated goldmine ! The best advice I can give to you is to observe what is shared in your niche and what publications are engaging. By knowing this you will be able to earn karma more easily because you know what seems relevant to the community. However, I don't know your objective but I know that what brings the members closer is the Discord servers of the subreddits where you can more easily have discussions. Enjoy :)

Some subreddits require karma to make new posts. There is a couple subreddits like karma4karma to start building. i used a bot to auto comment on these to build up initial karma, some think it's controversial. I ended up deleted the comment history after too. lol