pretty much same advice as above. I just did my first comp and was using 5/3/1 in my training. I did use a peak so to say but it was just what I felt would give me confidence. I did a set of triples 6 weeks out, doubles 5 weeks out, heavy singles 4 weeks out, 3 weeks out I did singles with a weight between my first and second attempt weights, then 2 weeks out I just worked up to my openers, and then deloaded 1 week out.
It helped me feel better handling bigger weights than I trained with. but im a beginner and I believe most first timers use 5/3/1 and just deload the week before with a lot of success. Open reletively light and you will have a fun time.