In the 80's, I commuted 19-21 miles each way and did it most days. I also owned a car. I had to travel a lot for work and if I was jet lagged from international travel, I drove my car. I would say I was a strong cyclist, someone who would do 100+ mile days loaded touring routinely without problem. I had a shower at work and had to wear a jacket and tie in the office. I would say commuting 50 miles roundtrip by bike is hard w/o a car for backup. I did it mostly because the car trip was 35-40 minutes but I could do it in 1:00 by bike riding at a good pace. Most newbie cyclists would need close to 4 hours to cover 50 miles and even a strong cyclist is going to need 2;30-3:00 hours. Makes for a long day, every day.
I'd say you will not succeed. Sorry. If you have a car, you might be able to work up to riding most days.