What type bike? Do you expect to ride at moderate to high levels of exertion to build up your performance or will most of your riding just be for leisurely rides of a hour or less?

The longer your rides and the harder effort you put into those rides, the more important your saddle position is. I'd recommend that at first you set the saddle fore/aft position to a neutral position with the seat post clamp. And have it somewhat level. Set your saddle height to allow you to have a straight leg when your heel is on the pedal at the furthest position away from where you sit on the saddle. If you don't have a trainer to put the bike in, then get next to a wall and lean your shoulder on it while checking whether your leg gets reasonably straight. Hold the brakes or block the wheels might be a good idea. Also, you don't want to force your leg straight, you just want is a normal straight.

After you have ridden awhile and start to find something to complain about, then we can go from there figuring out the next move.

Welcome to BF!