I think I’ve not done quite enough but should be enough to get round if I’ve done a 17 and a 20:
From 2018:
Jan - 6 runs - 28miles
Feb - 7 runs 56 miles
Mar - 3 runs 40 miles so far
Hmm, that doesn't seem like a lot. I'm running a marathon in May and my training so far is:
Jan - 23 runs, 197km
Feb - 19 runs, 214km
Mar - 19 runs, 262km (will be doing 2 more runs)
My training is towards the higher end of distance/runs (not that high though). You may be fine, but I'd suggest taking it very easy at the start and seeing how you feel.