hello, first welcome to the forum and well i may introduce you to the world of dj
First of all you need to count the beats of the songs, from 1 to 8 and then repeat, or like phil do, which would be 1,2,3,4 2,2,3,4 3,2,3,4 4,2,3,4 5,2,3,4 6,2,3,4 7,2,3,4 8,2,3,4 and then all again, well my point is from the first beat of the song, if you start counting, the melody itself will start in the 1, knowing this you can try a beatmacth thats when the beats of the 2 songs you want to mix are synchronized, to do this you have to move the beat untill it sound the same with the other song, once you do this, you have to turn de bass of with the eq (equilizer) then you can bring up the tune with the volume controllers, the ones in the middle, and it shouldnt notice the diference well not much, next you have to put a 8 beat loop, search for the loop and move it to 8 beats, i like to do this before the efect, so i have more control in the song.
By this point, the song you started playing should be ending with the boring part, well this part is for mixing, simply take the loop out and when the efect start just start decreasing the volume slowly, till the song is out and thats it,
and finally, repeat all over again