You are doing this for YOU, so don't worry about what anyone else may think. I am slow too (by the way, 14 miles in one hour is no slouch!), but I completed a 'casual century' three weeks ago. I am way too slow to do so many miles in an organized ride, so a biker friend of mine came along and we encouraged each other. She also rode with me for my 60 mile birthday ride. Do you have any friends who bike who could do some of the miles with you? Maybe you live near some TE members who would be willing to come along. Several options, just remember you are doing this for yourself and the gear/apparel you use is fine as long as it works for you. Good luck and I know you can do it!!!!
P2
2018 Trek Silque SLR6 - Selle SMP Glider
2018 Specialized Dolce EVO Comp - Selle SMP Glider
2011 Trek Madone 5.2 WSD -Selle SMP Glider
2013 Giant TCX W - Oura 143