Trying to get pregnant for the first time

Hello Glowians, 
I absolutely love <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> and thank you all for sharing your tips here.
I am planning to get pregnant and just started having sex without any precuation. I have couple of questions... 
1. When ever my husband ejeculates i can feel it all coming out as soon as he removes it from inside of me. Does it minimize my chances of getting pregnant?
2. I am over weight so anyone here who had pregancy complications because of overweight, can you please share your experiences and tips.
Thanks in advance