I guess lack of tips really make this game difficult. So here's a few.
1. In the beginning of the game, I'm talking about the home scene with your grandma and grandpa, your choices matter as they will determine your perks. For example, telling Elly you look Handsome will grant you charisma perk, choosing looking like a child will give you innocent perk (less suspicious), looking at happy families will give you Voyeur perk to make sneaking and peeking easier. If you choose you like to swim, you'll beat Elly in swimming later. And all those early choices are important in determining your strength and story progression. So choose wisely.
2. Your companion is crucial, Marika and Genni are both good companion to fight with in your journey but Kelly is entirely useless.
3. Prepare as much as possible before going on your journey, learn burglary and then steal as much valuables in the village to sell to Kelly and buy sword and potions. Rather than looking at the girls when they went to bath, go to their home and steal things, because you need to sleep at night.
4. The inventory is clunky, but usable, more of a renpy limitation if anything. Pay attention to the + and - sign between the name. You can shuffle between yourself, your companion and the elf to move possession around after you drop them to the ground.
5. My best advice, but also the worst, the management is quite tight so use console to control day and tweak your stats. You can one punch orcs to death, but being too strong will make you skip/bug out (if not fixed yet) some naughty scenes as they are a part of the player's training process.