I also started in October and likewise seemed to waste a lot of time. I think it's an accepted part of the process, drifting around a bit and wondering exactly what it is you are supposed to be doing! I got the shock of my life around 4-5 weeks ago when I had to attend an informal meeting at university with all other new phd students, just to get an idea how everyone was coping. One girl had completed her draft lit review and I hadn't even typed a word! I've really got going now and am working on my literature review but it certainly took a while to fully get my head around the process and get started. I certainly don't think it's too late, you are only 4 months in and I don't think there is tremendous expectation to have achieved much at this stage