what are your goals ??
what is the logic behind starting the nolvadex so far after the test?
you need to figure out a better PCT protocal.
but all in all 500 mg a week is higher than Id suggest for a first cycle , but I'm a bit conservative I guess.
at a dose of 200mg a week of quality test has my total test levels WAY above the natural levels my body can produce so for your first cycle I'd start at 200 and see what happens , then bump I up next go round.
18% BF is reasonably high especially considering your weight , Id suggest a pretty tight diet and plenty cardio his first cycle counting on the test to basically be their as insurance against losing muscle. Drop a good bit of fat then run another cycle with clean diet an a little more food to add sone muscle