knotical:You might want to do a “try scuba” program. Most, if not all, certifying agencies offer one. They are usually pretty inexpensive, or even free. They take place either in a pool or very calm open water. It gives you a chance to actually submerge on scuba, with an instructor. Explain your concern to the staff in advance. If you can’t equalize, you can just stay on the surface.
I’m most familiar with PADI, who calls it “Discover Scuba Diving. They offer it at eleven locations in Israel. See:
http://www.padi.com/padi/common/dcnr1/results.aspx?country=ISRL
I agree with knotical... Find an LDS, you'd think you'd be happy with... let them know you need to make a 'test run' in their pool, solely for the purpose of testing equalization, and if it's not a problem, you'll sign up for their OW class... (if they don't accommodate you, then I'd go elsewhere anyway).
You'll know in the first 10 feet if equalization will present a problem (of course, make sure you understand the Valsalva, before heading for the bottom of the pool)... And, also understand, that it *does* get simpler, and 2nd nature with each progressive dive...