any natural booster probably wont start kicking in until around week 3, so 30 days is kind of short, i bought enough for 6 weeks, but some like going 8 weeks. i didnt have money for anything special, so i just got inhibit-e JUST IN CASE...... but at your age it probably wont do too much, maybe a libido boost? eh, i dont know, if i were you id spend the money on something like a PWO instead.
me personally, i love 5 days on 2 days off, but a lot of people like other things, find what works for you... i do
mon - chest
tue - back
wed - calves and tris
thur - thighs and bi's
fri - shoulders
i shoot for ~5 lifts for bigger muscle groups 3 sets each, and ~3 lifts for bi's, tri's, calves with 3 sets each and a 4th superset.... i like this better than doing each muscle twice a week for less sets. i actually used to split my chest into 2 days, lower/flat and incline, back split to pulls and rows, shoulders to front and rear, etc which was ok, but i got tired of doing each muscle twice a week and didnt look forward to my workouts as much, thus didnt put as much into them...... just try different stuff and find what works for you