Thoughts on my training plan? (Help)

Hi, do you think my current plan is wrong? What would you change from your perspective?
I don’t really know how to structure my weeks properly.

Do you think it would be wrong if I spent the first 12 weeks doing base training (mostly Zone 2 runs), then switched to tempo/threshold runs for 5 weeks, followed by 2 weeks of intervals, then 3 weeks of steady state runs (SSR), and finally 2 taper weeks before the race?
I have 26 weeks until my first 100 km race with 18,000 ft elevation gain ( 5000 D+). I’m now entering the last 3 weeks of my base phase so far, and I’ve done all my runs in Zone 2.

Thanks y'all!