Welcome to the forum and Merry Christmas!
If you wish to build a layout where you can reverse the direction of your train, then you need additional track and some switches. The easiest type of layout to do this is a modified Figure 8 layout such as this one.
https://www.scarm.info/layouts/track_plans.php?ltp=107I had a similar layout to reverse my trains.
All pins are made to come out. You may need to use a pair of pliers as a lever to get the stubborn pins to come out of the track.
Larry