Pump shotguns are reliable and relatively inexpensive. Auto-loading shotguns are more expensive, heavier and require more maintenance, but many hunters prefer them for their quick shooting ability. Double barrels can be the most expensive, but some hunters prefer their feel and simplicity. Make sure your gun is approved for steel shot. If you're not sure, take it to a gunsmith.
Gun clubs are an excellent way to get practice and find new hunting partners.
That means shooting different shot shell loads through your gun at a large target at 40 yards. Change chokes and see how and where the pattern of shot hits the target. Shoot one shell per target, then label the target for the combination of load and choke you just used. You want even distribution with most of the shot falling evenly in a 30 inch circle. You need gear.