Hi, so I was setting up a flight plan from KLAX to KSAN today.  I pulled actual flight information from "flight aware" - such as gate info, cruise alt., etc.  I use PFPX for flight planning purposes.  It set me up with the following flight plan:
KLAX LOOP9 PLYYA1 KSAN
Flight Aware listed the cruise alt at 11,000ft.  There are altitude restrictions on the PLYYA1 ARR well above my cruise alt.  My question is - is it allowable to have a cruise alt lower than the higher elevation restrictions on the ARR, and do I simply fly the PLYYA1 ARR and ignore the higher alt restrictions until I get to one that is at or below my cruise of 11,000ft? 

Question 2:  While on my return trip, my cruise alt was 10,000ft.  Once I reach 10,000ft, am I allowed to go above the 250kias speed restriction?  I assume it is set for below 10k, but what happens when your cruise alt is right at 10k?

I have a question regarding what to expect if utilizing a procedural hold as shown for example on the approach plate for KLAS RNAV 19L.

I am fairly new to understanding procedural turns/holds, etc. and would like to understand what I should do in the event I am cleared for the approach by ATC.

Looking at the approach plate for RNAV 19L, if I am coming in from the South, I'm not sure if I would cross the LAS VOR, follow 018deg. Radial to HAMIG maintaining 6300ft, then conduct the published hold, and follow the remaining fixes to get me to 19L?  Or would I proceed direct to HAMIG (without crossing LAS), follow the published hold, then remaining fixes to 19L?

I'm sure ATC would vector me close to the approach, however if I hear "approved for the RNAV 19L app", I'm wondering specifically which navaid I should enter the approach at.  - this is of course assuming I am coming from the South and not utilizing either IAP points (LAPIN or SUVIE).

Thanks in advance!

Bill Kirkland