I'm in the same boat.
I wish, I really wish I could have practiced on an acoustic kit all these years.
But don't fret too much.
You can still learn core hand technique, you can still learn grooves and chops that WILL translate to a proper drum set, although I find (and so do others I've spoken to) that it takes a bit of getting used to the size of an acoustic kit (as in the size and locations of the drums) before you can whack out your most complicated stuff on an acoustic.
Dynamics is also a problem; but I've found there is an essence of 'believing in the dynamics' here; you can play quietly on the rubber/mesh pads, so you can play quietly on a snare drum or tom and it will sound 'correct' still, despite any worries that the sound will be vastly different when really it won't if you have good technique.
The coordination between limbs you learn on an electric kit will obviously still be exactly the same as on an acoustic kit; that's down to your mind and your body, not the instruments you're playing with.
Rebound may be different, eg on the toms, but advice that I've recieved is to work on your core hand technique both on the pad, and on a non-rebound surface (eg pillow). Aside from doing that, there's not much you can do about this problem apart from get an acoustic kit and get used to the rebound! Though if you place importance on using the rebound to help you but not relying on it, this shouldn't be an issue.
Having weekly access to an acoustic kit is very good though, stick with that as much as you can.
On the plus side, as an e-kit owner, I often get away with practicing at ridiculous times in the evening. My cutoff point is 11pm - would you get that with an acoustic kit? What if you're at work and you come home and you're too exhausted to practice, but perk up at say 8/9/10pm? Too late, your drums will piss everyone off at these times!
I'm fortunate in that in 2 weeks I'm entering the British Army as a musician, and after my basic training I'll be able to practice all I want a very good percussion room when I'm in my phase 2 (music) training. I know that it'll take me time to get used to the feel of an acoustic kit, but like you I've had weekly access to an acoustic before and I'm confident that I'll get a grip of things in a short amount of time when I'm there. All is not lost.
When I first got my electric kit, I was frustrated with it and even considered quitting at one point, but I was about 12/13 years old and I'm sure in retrospect that was just a frustrated kid thinking. I stuck with it and I'm glad I did.
I find a lot of it is simply self-confidence: be confident that you've practiced the coordination of this fill or that groove, and that you can play it on the big acoustic kit in front of you and it'll be correct, despite practicing on an electric kit.
You can't practice brushes on an electric kit (maybe on the newer ones you can?) but I have an acoustic snare and stand - it's the only acoustic drum I own - so sometimes I'll set that up and just groove with brushes, or even just use my practice pad on a snare stand.
So, in short, don't worry too much, but be aware that there are differences you may have to work on.