I'd certainly suggest doing the Regs - C&G 2381. 2 or 3 day course with the multiple choice exam at the end.
Not difficult and certainly teaches you how to find your way around the Regs which at the end of the day is what everything refers back to.
There are a lot of private firms which do it and most decent Technical Colleges do it too.
Then later - I'm just doing mine, the C&G 2391 - Test and Inspection. Heavy going with long written and practical exams.
Really depends on what your previous background/experience is.