Your best bet is to learn how to count beats using the first method. Just right click the waveform icon in the top left corner of the audio file, and click on Detect tempo. Start by aligning the sample with the start of the song in the Playlist. It helps you align the BPM of your project with your sample. Most of the sounds you find are prohibited by the copyright police.
But be careful if you plan to make beats for profit.
