A cautious yes. I did anyway 😂
There are plans that will get you to a marathon in 16-20 weeks from very little base. Clearly people take that approach and suceed, but the injury risk is relatively high from constantly pushing at boundaries. The post-marathon burn-out is quite high from that approach too.
My training of 9 years from C25k was a tad on the slow side 😂 I wanted to be comfortable with HMs first, and had got to the stage where I do 3 per year. Then I picked up an over-use injury and I blame race congestion of Covid and the spring/ autumn races bunching up. I thought I was doing brilliantly, even smashing pbs, but just over did it and ended up deferring the marathon place rather than having the strong base I'd hoped for. A few months later and back to C25k. However other than one niggle, I did have years of stamina, strength and experience of long runs under my belt which is different to C25k from scratch.
I jeffed my long runs and marathon and kept the pace right down. I'd aimed to do it anyway, and the gentle approach worked and I emerged injury free with a light recovery. I enjoyed the challenge of training and the finale of race day. The hardest part was the 4+ hour 20 mile run in relentless mist and drizzle, alone and aching having shifted the run forwards to the least-worst forecast. I kept the rest of my running load down with parkrun (run-all) and a couple of gentle short runs to feel as the rest of the running, and yoga/ weights/ swimming for general health and fitness.
My advice to a new or light runner would be to take the year at least. Get comfortable with 5k, 10k, HM first. Do a training block for each, then dial back and recover. Build that base up.
Psychologically all my marathon training was was a 14, 16, 18 and 20 mile run beyond my normal range because I was used to being halfway there. Cross train. Value general strength and flexibility. Respect the distance and ease off on the speed. Jeff (planed, short run/ walk intervals) if needed; there's no rule that you have to run the lot.