Just thought I'd post here for the first time seeing as I've started doing some cycling, mostly for fitness, at the weekend.
I'm really rather unfit and overweight, prior to January I hadn't done any real exercise for several years, then in January I started going to the gym and built it up to the point where I can easily do an hours cardio in the morning 4 days a week (30 mins cross trainer, 30 mins cycling)
Anyway, at the weekend I decided that I'd dust off the road bike I got on the cycle to work scheme at my last job (and did use occasionally for the massive 1.8 mile commute) and take it out for a ride. I set up a nice ~5.5 mile route in google maps that was mostly on very quiet roads, but is a bit hilly which is to be expected when I live in Dursley on the edge of the cotswolds
So I went out on Saturday and failed almost immediately, seems the front mech wasn't adjusted right so I couldn't shift down to the smallest chainring which doesn't help on the rather steep hill just around the corner, so walked up that and manually put it onto the 'right' gear and continued on, unfortunately this meant that the straights were slower than I should be able to do. Add in my lack of fitness and I stopped a couple of other times as well, not a great start.
Then on Sunday I made myself go out and do it again, this time after adjusting the front mech so I could change gear \o/, I also used Strava although I won't link to it as it's rather crap. But this time apart from one stop about half way through, and a minor if rather amusing in hindsight incident on the first hill, I made it much better, averaging just over 10mph on a course that according to strava has an elevation of 437ft over 5.6 miles.
So I now know I need to work even more on my 'actual' fitness above what the gym provides so I intend to get out more, but glad that I mostly made it yesterday and it can only get better from here

The hills really kill me though (and I'm guessing my weight doesn't help here).
Anyway, kinda the reason for posting is for some advice/help:
Saddle, my god it's like sitting on a rock, is this just something to get used to or should I get a new saddle, and if so reccomendations? Note that I do have some padded lycra shorts (that I wear under jogging bottoms) but it's still rather unpleasant sitting down.
Brakes, the route has quite a bit of single track which is fine for the most part but on the downhills it's a bit worrying, I think I've got several year old Shimano Tiagra's (I'll check when I get home if needs be), but thinking it might just be a case of new pads?