good evening!
begin to read Kaplan books+ FA (or Crash), after first reading do some Qs like kaplan old Q bank (by subject), then read books again . After that buy online Usmle World at least for 2 months. When you finish all Qs with explanations take NBME form 1, read FA (Crash) , take NBME form 2--->take real exam! by that time you will be ready.
it worked for me!
good like.