As well as the saddle itself, the exact height, tilt and fore and aft position are critical. An item that will help a lot is a 2-bolt seatpost, ie a seatpost with two fore and aft located bolts to act both as the clamp and adjust the tilt. The real blessing of those posts is that you can go for a ride, bring the wrench for the seat clamp on the post. Now you can stop and adjust the tilt without losing the reference. (On many post with one bolt, loosen the bolt and the seat flops down and slides along the clamp and you have lost all reference. With 2-bolt, loosen the back bolt as much as you need, slide the seat or tweak the front bolt to modify the tilt, then re-tighten the rear bolt. That easy. Reverse the procedure and you are right back where you started.)
Two excellent posts are the Nitto and the Thompson. (Thompson also sells its clamp hardware so any framebuilder with machining skills can make you a custom post with their excellent clamp.)
You are just starting so this may not be necessary for you and you have plenty else to think about. But keep in mind that if you have troubles getting seats to work for you, this could make a big difference,
Ben