Hi Amir,
welcome to the library scene. You may be a rookie but you have some good compositional skills and ideas. Although this is not my main genre., my observations are track 1 was the nicest simply because it was understated, it is a soft and slow track. In tracks 2 and 3 I felt the sound needed work, it is lacking in the low frequencies, need to feel the power of the daikos etc. The tracks need more melodic development and variations to keep the interest. You may want to think about having several climaxes instead of just 1. So work more on your mix, check the sound on different monitors and work on thematic development and keeping the interest. As far as timed edits, this gets better with practice. Pick the most important part of the track and work around that, I would start with 60 and 30 sec, as it would be very difficult to do a 15 on these tracks. I hope that helps, best of luck.