If you are new to longer rides, there may be a period of just getting used to it. Try padded shorts first. Then try tiling your saddle a few degrees each direction and see if that makes a difference. As long as you are just dealing with soreness, you are normal. If numbness occurs, throw the saddle away immediately and try to find one that fits you better. Long distance riders are known to find a saddle that fits and use it on every bike. I like the Brooks B17, but you may be different, and it is still difficult to find specific stuff right now at shops.