Aside from that, changing your clothing to reduce your noise and visibility helps. Kingdom Come: Deliverance is a bit of an oddity, in a lot of ways. In other games, you build stationary objects: fortresses, houses, even entire cities. increasing your Horsemanship ability, unlocking perks connected to that skill or getting pieces of armor and other equipment usable only by a horse. In Kingdom Come: Deliverance, you increase your skill levels by actually doing things.
There are a variety of stats and perks you can level, improve and unlock in Kingdom Come Deliverance.