1st time souls player here, was it a big mistake?

Elden Ring was my first souls game. So I asked my friend, who has a lot of experience with these games, which stats I should level up. He straight up told me strength, vigor and endurance, but didn't take into account which build I was using lol. I was using the samurai with the uchigatana + storm stomp ash of war(which primarily scales with dex), and by the end of the game, I had pretty much all of my points split between vigor and strength. So I'm just wondering how much more difficulty I made the game for myself or if it's not that big of a deal. I also didn't use summons, nor any buffs or consumables to enhance damage(except for the radagon fight) and I didn't even know you could use talismans up until I was on the Maliketh fight lol, so leveling up was all I had on my side.