iight here's what I think you should do... 1)What typa beat to use. -Use any beat you want thats all up to you.... 2)depending on the beat,the topic. -As for the topic I usually listen to the beat then brainstorm...Sometimes I do make a topic before though...in that case I usually have in mind how I think the beat should sound..... 3)it may be played at a house party later on afat recordin and dunno how to approach that. -It usually depends on the DJ...You should just go up and tell him you got a track you want him to play.....Just beleive its your best work and you'll be fine 4)should there be a specific bar limit? -This depends on how many people are gonna be on the track and how the beat is...A song should usually be around 3 minutes though...