In the past, I've used API Quick Start and Seachem Stability to kick start cycles in my aquarium -- both are safe and effective so long as you follow the instructions located on the back of the bottle.
Filtrate a new running tank by ringing out the muck from an established sponge near your filter intake.
To avoid a mess, I connect an established filter up to my new tanks. It's a fast and effective method to get your filter and aquarium seeded with beneficial bacteria.
Some nitrogen cycles can start immediately; others may take 2 to 6 weeks, depending on your chosen method. You will know your tank cycle is complete once you see the levels of nitrite and ammonia reach 0ppm.
It’s always best to do more research in order to achieve an optimum aquarium experience. The best way to learn is by communicating with fellow aquarium hobbyist and learning from other people’s experiences. A great place to do this is Facebook. There are aquarium groups for pretty much every style of aquaria. A group on Facebook I recommend joining is Aquariums for beginners especially if you’re just getting into the hobby.
Another great way to learn is by starting an Instagram and interacting with the aquarium community on there.