Yes, get the semi auto.... but not in 9mm... in .22 lr. Almost everyone has to wait, or spread out their gun purchases. You are a new gun owner, and will want to pull the trigger lots. Anything except .22 LR is expensive to shoot. You can buy a .22 semi auto for $400 on the most basic end of the scale, in a 1911 frame. ie. GSG Buy extra mags, as with .22 cal, you and your friends will be able to shoot as much as you want, and having someone help load up mags... you will appreciate the extra mags.
Then, your second gun can be the 9mm. Long term, I doubt you will shoot the revolver much, if ever.
BUT most importantly, learn how to competently be able to remove the semi auto slide on your gun, and clean it properly. If you don't have a friend or family to assist you with your first semi, there is a plethora of good tear down videos on youtube for just about every gun. Proper assemble / disassemble / lubrication of the gun is key to safe shooting. Respect your firearms, and the care they require.
In your eagerness with your first semi automatic... DO NOT take it to the range, right out of the box.... as the slide likely needs oil. Taking it outside in cold winter temps? A synthetic motor oil like 5w30 doesn't hurt... Yeah, a synthetic motor oil you use in your car is designed for truly extreme conditions, both hot and cold. If you are indoor or summer shooting, don't bother with the synthetic, and don't overdo the oil... or the slide will end up collecting an inordinate amount of gun powder from the fired rounds.
PS What... Me? Push synthetic crude as the ultimate gun oil... Because I earn my living in the oilsands? FYI: Tiny bottles of gun oil are fancy... But they do have more wax in them.... The synthetic motor oil for your vehicle engine is our little secret.
