Yes, both your test e and deca need to be run for longer to see the full effect. Test will start to show some effect after a month. Deca will take a little longer. If you want to run a test/deca cycle, I would suggest you dose it at 500mg test, 350-400mg deca, both run for 12 wks. Deca can shut you down hard, so you might want to run some HCG through the cycle, as well as Adex to control some estrogen, then clomid post cycle.
1-12
Test E 500mg EW
Deca 350-400mg EW
adex .5mg 3x, more if needed
HCG 250iu 2x wk, until a few days before PCT
PCT starts 2 wks after last shot. 1 wk clomid at 100mg ED, then 2-3 more wks clomid at 50mg
Really, you could do this cycle without the deca and you probably won't notice the difference in the results. You can only gain so much at once, and since this is going to pretty much be your first cycle, test alone would max out some major progress and with less sidee effects. Deca can cause some issues that test won't. A big factor is, it can make it much harder to recover post cycle. So think about it.