You are on the right lines!
There is actually a slight difference in the expressions 'make it to' and 'make it for' (there's also 'make it through' which we might as well deal with while we are at it).
If you 'make it to' somewhere, you are able to complete the journey. If you 'make it for' something, you have made space in your schedule for it.
So if someone asks if you can make it 'for' the interview, he is asking if you have the time available.
If someone asks if you can make it 'to' the interview, the question is whether you can arrive at where the interview will be held.
If you make it 'through' the interview, it means that you complete the interview without anything going wrong.
The successful process would be to make it for the Wednesday interview, then make it to the interview, and when you have made it through the interview, make it to the party afterwards!