It really just comes down to good old fashioned discipline. When you start to drift off, instantly snap out of it and pull yourself back in to what you're supposed to be doing. Setting yourself small goals to start with can work wonders. Just go hard for 2 steps then take a mini 5-10 min break. Then set a stretch goal to get through the next 3 steps etc. Sometimes when we get distracted it can mean we're not emotionally in the moment and you've just got to push through it regardless, especially if you're serious about getting things done. Once you build a bit of momentum, it will get easier.
Sounds like a great opportunity and I'd be keen to explore it further if you're available for a Zoom/Skype call over the next few days.
Here's my site: http://pauljmorris.com.au/ and I can provide you with a detailed portfolio upon request. My email address is: [email protected].
Cheers,
Paul