That's seems like a massive amount of training on what look like random weeks.
20 hours in week 1??? For me, that would be the fast track to illness and injury!
What is the thinking behind it?
Why are you weeks so random hours wise? Wk1 20hrs? wk2 8hrs? Wk21 1.5hrs?
During Dec and Jan (weeks 1-9) I was doing loads of "random" stuff in the gym. Spinning, aerobics, rowing, swimming, steppers, cycling, treadmills etc etc, all geared towards nothing in particular.
Some days were very long (e.g 73k of rowing and 14km swimming (both non-continuous) You could put all that down as base training.
I think I decided to do the race and entered at about week 9-10
Once entered I started "training" I had absolutely no plan whatsoever and just did what i felt like on the day.
Swimming - I'd done some long swims during weeks 1-9, but from week 10 I only did 3 race distance swims.
Average 2800m per week (week 10-25)
Cycling - Nothing much in Dec -Jan. Started on the road February. Longest ride was 103 miles, plus one 90, an 80 and couple of 70s. I had some ITB trouble and barely cycled for the last 5 weeks.
Average 80 miles per week (week 10-25)
Running - Three 15 milers and a 18 miler on the treadmill during Dec -Jan . I did a 16.8 miler in week 11. a 20.2 miler in week 15 and a 21.7 miler in week 18. that was it for long runs.
Average 18.6 miles per week. (week 10-25)
(Week 21 - 1.5 hours - I had a bad cold.)