Fifteen-year-old Marian Sison of Arlington has been taking driving lessons. She has been practicing how to drive a manual shift car because soon she will be applying for her driver's license.

On how to drive a golf ball, Sison needs little instruction. She has done that exceptionally well, sometimes powering the ball 260 yards. Drives like that helped her win the girls division of the recent Bowers Junior at Springfield, where she eagled the 10th hole and went on to defeat Vickie Linkous of Roanoke.

Sison, who recently shot 66 to set the women's course record at her home Glenn Dale course, has turned heads with good golf showings this summer. In addition to the Bowers, she has won the Talbot Pro-Lady, the University of Maryland Junior and the Merrill-Lynch Junior Shootout. She was runner-up in the Virginia Junior and South Atlantic Junior. Sison also qualified for the National PGA Junior, starting Aug. 24 at PGA National in Palm Beach Gardens, Fla.

Sison plays the capital area junior circuit during the summer, but attends Boca Raton High School in Florida so she can concentrate on golf year round. The sophomore plays No. 4 on what is otherwise the boys golf team and No. 1 on the girls tennis team there.

Sison does not know what her future holds. "I'm enjoying it right now. As long as it is fun, I'll keep on doing it," she said. "Right now, the level I can attain is collegiate golf. I know I can do that.

"The ultimate would be to be a professional, but it's so tough and demanding, you have to sacrifice a lot of things.

"I'm always going to be doing something related to sports, because I love all sports."

Lois Ledbetter of Rockville will not be defending her championship Monday and Tuesday in the women's Lillian Payne Cup at Congressional Country Club, an amateur event, because she has turned professional.

Ledbetter, a Lakewood member and recent honors graduate of the University of Alabama, turned pro and qualified for the U.S. Women's Open by shooting 75 recently at Winchester (Mass.) Country Club. She shot 78-82, missing the cut, in the Open at Plainfield, N.J.

Poolesville pros Cary Ferrell and Rick Thomas will hold a three-day junior golf camp at the course off River Road in Poolesville, Aug. 4, 5 and 6, from 9:30 a.m. to 2:30 p.m. each day. The price of $35 includes daily lunch and golf instruction. Clubs will be provided for golfers who do not have them. For further information, call the pro shop.

Jeff Bostic, Clint Didier, Neal Olkewicz and retired former all-Pro Mark Murphy will be Washington Redskins hosts at the AT&T March of Dimes Celebrity Golf Classic, Tuesday, Sept. 15 at Tantallon. Senior pro Doug Sanders, second in the recent U.S. Senior Open, will serve for the second year as honorary chairman. He will be available to give golfing tips, besides playing with the participants. The entry fee, which includes green fees, carts, lunch, cocktail reception, gifts and team photo, is $350 per golfer. For more information, call the March of Dimes at 824-0111 . . . Some members of the George Allen-era Over the Hill Gang of Redskins will play in a Cystic Fibrosis benefit, Aug. 3 at Lakewood in Rockville.