Stay away from xpert, its the worst of the worst. If you have to shoot non tox, and don't want to shoot bismuth, find some hevi-steel or federal speed shok #2 in 3" 1 1/8 or 1 1/4. Put in a modified choke and go hit the patterning board (im sure theyll be fine but double check it doesnt look like a blunderbuss)
Aside from that, find a local trap range and go shoot a couple rounds every evening you can for 2 weeks before opener. Trap is perfect for learning the flushing motion of a pheasant and you will build TONS of confidence. Use 7.5 lead and a modified choke. It will be expensive when you are done, but oh so worth it in the long run. Dont bother with hand thrown unless you have a good electric thrower, it just wont be the practice shots you need. If you are having trouble at the range too, go to the clubhouse and ask if there is a veteran shooter around that could spot you for a round. Almost everyone will be willing to help you i bet, nobody likes to see someone struggle in this sport.
On your semi-auto question, i dont think ive ever had a good 3rd shot opportunity on a pheasant in my life. On a second flushing bird I have.