I play volleyball in a hobby-mixed team for many years now. Now that I'm old the results are two meniscal tears and a screwed right shoulder from spiking. I added a good amount (3 times a week for more than an hour each) of barbell strength training more recently (almost a year now) to support playing volleyball. The idea: strengthen tendons and muscles to allow my body the strenuous jumping, turning, ... and additionally alleviate/prevent back issues from all-day sitting in front of my monitors. Further I have lost 60 pound primarily through intermittent fasting (together with my gall bladder) and I'm somewhat nutrition/health obsessive, now: calorie counting, meal planning, cooking, baking etc. with proper macro distribution ... Ehmm, yes, so back to your question: don't play volleyball, too taxing. But do strength training, general fitness stuff, and use your time to eat and drink healthy ...

Don't try! Estimates are dangerous and should be avoided. When someone needs a number from you tell them they can make up their own. It doesn't matter. Better show that you can continuously deliver something of value, say each day. Let the middle managers or team figure out what that means for the bigger picture. I can recommend these presentations: https://www.youtube.com/watch?v=QVBlnCTu9Ms https://www.youtube.com/watch?v=bicBUVbeR58

If you want to be real fast (in terms of setting things up and development) and don't want to be bothered about all the "build" tools and plumbing, go with Meteor. It integrates everything in a neat package. You can exchange parts as you go and learn. The upcoming 1.3 release has React as the default view technology, but Blaze is great and very simple. If you already have a backend I would recommend Vue.js for the frontend. Just because it isn't React or Angular, read backed by a big company. Vue.js is maintained by a single person, so when Evan decides to stop development on Vue.js you should be able to pick the work up and drive the development in your personal direction forward.

Why did you actually start Vuejs? Was it planned as a replacement for Blaze in Meteor? Did you feel uncomfortable with the way Meteor's front-end was heading?