got one tip, which probly not for true beginners, but i found it pretty useful>
- in session view doubleclick the audio clip
- in the bottom section open the Envelope section by clicking the little icon "E" in the clip tab
- set upper dropdown to Clip and lower dropdown to Sample Offset
- right click to waveform and select Draw mode and select the time signature you want (try to start with 1/16)
- then change some of the 16th notes
- in Session view select the Audio clip and press Ctrl+C
- press Tab for going to Arrangement view and then press Ctrl+V and paste the loop to the same channel
- then copy/paste the loop to have longer section, like 4,8,16 bars, and modify the sample Offset.
- consolidate the loop and copy/paste it back to Session view for further layering