The question is how much Russian you can manage. If you have a basic grasp of the Cyrrillic alphabet, then you shall have no problem negotiating the metro and the train to Pushkin. I am going again next summer. You can also take the hydrofoil in summer right in front of the Winter Palace to Peterhof - this is a whole day's outing at least.
The last when I visited the Alexander Palace, only the Private Wing was open to the public, which I suspect is still the case. I do not know whether the Russians are in fact going to restore the Private Wing to its former self (as in 1917) or whether it is just going to be exhibition rooms (as currently). Maybe there is too little money to restore the whole palace as it probably needs a whole new roof which must be pretty expensive.
Tours are conducted in Russian, and I did not see any English guides and I must have been inside at least three times. You best guide of the rooms is by far this very website. A wonderful time to visit is in June during the Pushkin Festival which is held in Pushkin (Tsarskoye Selo). Oh my, and do NOT forget the wonderful china you can buy at the Lomonosov Factory shops in St Petersburg. It is worth carrying it as hand luggage around the world back home.
I cannot help you if you don't know some Russian at least. I have not gone on organized tours. I normally book myself into one of the city hotels for 10 days and at leisure go to the opera, ballet, churches, palaces and art museums. There are wonderful restaurants as well.
The palace is definitely worth the visit. Some of the original furniture is there, e.g. Nicholas and Alexandra's twin single beds, and the whole of the new Study.