Nice pick up...I have a d3200 and im looking to get these two lenses next...
70-300mm
50mm
The 70-300 isn't worth it, esp. on a crop sensor. Nikon's crop factor is 1.5:1 (full frame is 1:1), so that lens on your camera is roughly a 105-450mm.
For you Canon shooters, the crop bodies are a factor of 1.6:1.
For the 50mm, I have 2 suggestions...
Get an f1.4 lens. Costly, but much better than the f3.5. and even the f1.8. besides the f stop, the build is much, much better.
If you can eventually swing it, I would opt for a 35mm f1.4 and an 85mm f1.4. Yes, double the money, because you are buying 2 lenses. However, imho the 50mm is too long for indoor use and too short for outdoor use.
And remember, that 50mm is going to be like a 75mm lens on your crop sensor.