Hi, I guess it all depends on where you are planning to carry out the research. Some institutions are known for taking in students, and I am sure that you wouldn't feel lost as the members of the lab are probably used to explaining things in a more detailed way.
Besides that, just ask. If you are not completely sure why one uses one technique over the other, or why a certain step is crucial for a protocol, asking a question is the best way to make sure that you get the information you want. And of course, post-docs and graduate students appreciate that as well 😀 Good luck!