What kind of clay shooting-skeet, sporting clays, 5 stand, trap, etc. Since you are a beginner (or even an expert) get either a gun with choke inserts if possible. Otherwise get one with an open choke in one barrel (skeet, improved cylinder, etc) and a moderately tight barrel in the other (modified, etc.) This gives you a better opportunity of hitting while learning where the gun shoots.
For clays of any kind use the lightest loads (I use 7/8 oz most of the time) with lowest velocity possible for anything under 30 yards. You will not be hammered by the loads and it will help prevent recoil shyness. #9 skeet or go with #8 shot. If trap, use #7 1/2 with the modified barrel.
Sporting Clays are the most humbling of the clay shooting sports in my opinion. No matter how good you do one day, they change the course and you are back to square one.
Take a lesson from a pro. Sometimes they discount pretty good with two students at the same time.
Oh yes for guns. If you are looking for a good deal on a SxS, check out Lion Country dog supplies. If you want an O/U, you cannot beat a Beretta or Browning Citori. Both under $2k. The Beretta is lighter than the Browning if you want to hunt all day, but the heavier Browning absorbs recoil better if you are just shooting clays.
O/Us tend to be a little easier to hit with since they have a narrower sighting plane. But I love my AYA #2 SxS for bird hunting. There is just something classic about shooting a well balanced SxS. I also enjoy hunting with an inherited LC Smith SxS from about 1950. It is sort of like carrying a time machine taking you back to the days of Hemingway and Ruark.
What ever you decide to do, have a great time!:luxhello: