I've started running during my walks. Not going too hard at it. Probably more closer to a jog (a fantastic NZ invention) than anything else.
I do short runs, the first blitz I did was 450 metres long on the road. It was pretty flat so incline isn't to blame here. I started getting huffed out by the 400 metre mark, and I went back to walking at 450 metres because I was a nauseated faggot.
I was feeling pretty light headed and a bit dizzy. I was huffing and puffing trying to capture my breath. My legs weren't the limitation. It was the nauseous feeling that made me go back to walking.
I like running but this feeling sucks. Any tips?
Just keep doing it every couple of days or so - you'll become less pathetic. If 450 metres is too long for you, drop back to a couple of slow 300 metre jogs with walking in between. Over time gradually increase the run length and reduce the walking recovery time.
Regarding the nausea - for me hard training would make me feel nauseous if my stomach was empty. I'd feel sick if I went for a run first thing in the morning, but would be fine if I had (a small, easily digestible) breakfast first. I used to have training sessions that would last for about 3 hours - needed a banana in the middle to stop feeling sick there.