Very old iron when DCI's were the game improvement models that Titleist produced. Looks to be a stock graphite and I guess the flex info has worn off. It's a good guess that it probably is a senior flex but if it was a ladies flex, it should also be shorter than standard length. Those oversized DCI sets were more popular with high handicap, seniors, and less skilled ladies. I know you said you are new at golf but at some point, you will benefit from getting a fitted set that better matches your physical characteristics and golf swing. Welcome to the game and hope you have many future years of enjoyment.

It’s tempting to buy used clubs when starting, for good reason. Been there, done that. Especially since I thought I could teach myself (terrible idea).

However, a 25-30 year old wedge (circa 1995-97) won’t be much help. The balance and shaft flexibility is just so different and the groves have likely seen better days. This model actually predates Mr. Vokey building wedges for Titleist. A good starting point for wedges would be a gap wedge of 48-52 degrees F grind SM 6/7/8/9 with a stock wedge shaft. Then a 54-56 degree sand wedge, F grind or S grind. All depends on the loft of your set Pitching wedge/iron. The set PW will be 43-48 degrees and the two wedges should not be further a part than 4-6 degrees.

SM-9 is the current model. SM-6 was released in 2016. The newer, the more costly. Best of luck on improving your game. Working with an instructor for your swing mechanics and getting insight on clubs that can help your game will be worth the investment.