Hallo and thank u for the help.

how much HCG shuld i use?

on steroid.com they say like this:
As regards HCGs use of Post-Cycle-Therapy (PCT), smaller and more frequent doses after a cycle of AAS would give the best results with the least amount of side effects. A dose of 250iu to 500iu everyday (ed) for 2 to 3 weeks is plenty and should very little from person to person (3). The Physicians Desk Reference recommends 500iu/day, as did the late, great, Dan Duchaine. The smaller doses are sufficient enough to begin reversal of testicular atrophy and used in conjunction with nolvade, will help the already present problem of recovery without raising the levels of estrogen to high and increasing the risk of gynecomastia in the user. Lower doses of 250iu to 500iu also avoid the further risk of down regulating LH receptors in the testes. The old saying more is better definitely does not apply to the use of HCG. You dont want to finish PCT after using too much HCG only to find out your back at the beginning again

So acording to steroid.com 250-500iu ed for 2-3 weeks is the right thing

And here on eroids a big post made by some docter states that the right thing to do is to use 2000iu eod for 20 days

And another one here on eroids is saying 2000iu ed for 14 days

And about injection, is it done the same way like test (in muscle)?

the cycle i am on looks like this:
week 1-16 sust 250 e3d
week 1-8 npp 100mg eod

this is my first cycle ass ever
age 25
83kg
thank u wery much for your help