I have aquasee googles, but mine are also prescription googles as otherwise I can't see a thing!
I have been known to do a U-turn halfway in the lane to create a bit more space between swimmers. It's a nice change to do an odd number of lengths sometimes- keeps me on my toes with the count.
I agree with swimming to how you feel on the day. My morning swims always feel harder than evening. It's a bit of a rush, because the pool opens at 7:15 and I realistically only have half an hour before I need to get out to get to work. And I think I am generally less warmed up, and there's a bit more of a bustle in the lanes.
Whereas my evening swims are much more relaxed and I seem to achieve more, either distance or drills. I still find it can take me the best part of 20 lengths before I feel into it.
I find breaststroke the easiest, in that I rarely have to think about my breathing and my heart rate is slower. I have been teaching myself front crawl and I'm not bad at that now but it's a thinking stroke for me.
I started by doing breaststroke up to about 20 metres in a lane, and then doing the front crawl for the last bit. Then I did half and half, psychologically it helped to know that the wall was only a few arms away to grab onto. Then I was able to do a full length. ATM, I tend to breaststroke/backstroke up for 1 length and FC back, which helps keep my body moving but allows me to recover. It is my aim to do 2 FC consecutively (which I think I could probably do now, if I can get over the mind wall about it).
I still watch technique videos and try to practise different bits. My main advice is to go slow, slower than you think. The slower I go, the faster I actually am, because my stroke is moving my body through the water better, and the energy is spent better in propelling. I find a few lengths on backstroke helps with my rotation.
Going back to the goggles, get your head under water and watch the other swimmers! I have learnt quite a lot this way. I saw that not everyone breathes on different sides, this was a revelation! To stop the choke, breathe in through your mouth and then out through your nose. Some people breath out in 2-3 short bursts or 1 longer one, but it's a personal choice.