Think about the topic of your Rap.
Create a low tone ( low note etc). The bass line should be in the same key as the song so that there are no 'sour notes' and the beat is easy to work with. The bass line should not be as lengthed as the melody line but should work with it and fit together. Also never forget to add lyrics. If you dont have softwares or instruments, search for beat on youtube
Structure the song. A popular song structure would be: Intro, verse, chorus, verse, chorus, chorus, middle 8 (AKA breakdown), chorus, outro. The intro usually consists of all the parts playing, the verse would be just the bass and the drum beat, then the chorus should be all parts playing, the middle 8 (breakdown) should be anything of your choice but must distinguish itself from the rest of the song and the outro is simply the beat just playing on until the song ends.
Write lyrics. Rap about anything, but remember to write to the beat, and make sure that your 'flow' is not whack! Just make sure that the lyrics match or just associate with the name of the song. Put your heart into it, be in love with the song when recording it or writing it. Just keep rapping.
Listen to your inner rapper to figure out what works best. If you are not sure what to say, remember that the point is to get beyond your mind/memory. Make up sounds and let new language emerge. Try focusing on famous musical artists you respect/love ones/Jah/your heart and see if that affects what comes out. Focus on rhythm and feeling... Let go, flow and appreciate. Ask people for advice
Keep in mind, what you're going to rap about and keep writing everything that runs through it on something, if your on a bus, paper or your hand will work just fine, a book would be nice too. Then read everything later and keep the BEST material.
Try to rhyme at least once a sentence, make sure not to repeat words , unless it's a verse, or at least sounds cool. Keep a constant tone, if you want to have fun with different voices then dub it over later. People can tell when you're changing your voice and it's lame at best.
You don't need to buy FL Studio to get started. There's plenty of free audio editors, such as Audacity that provide a free way to make music. If you happen to have an apple mac computer, those come with Garageband, which will allow you to record right out of the box! Also remember to keep it simple and make sure it has rhythm and beat!
