True ghost story (haunted house)

I bought my house back in 2018, when I first moved in I was really happy and proud and thankful to purchase my own home. Nothing happened at all for at least a few months then it somehow started getting strange and scary. I remember it started by I would be in my bed and it would sound like someone was walking down stairs than slowly started escalated from there. I used to wake up in the middle of the night and hear faint far off music that sounded like it was coming from somewhere down stairs and I would open my window to make sure it was not coming from outside and there would be no sound outside (I live in a very rural area) then I started hearing people talking down stairs like indistinct voices whispering / arguing at 2-3-4 o clock in the morning but when I would open the door to my room it would stop. One morning I woke up early like 5-6 am and was drinking a cup of coffe in my kitchen and I saw a shadow figure quickly walk past the threshold of my kitchen out the door and disappear. I was wide awake and it was light outside. Since then it would stop for months or years then becomes more activated periodically then stops again. It makes no sense to me was wondering if anyone else had a similar experience or could shed light on it. I’ve also had more creepy experiences here than I can count what is unsettling is how random it is and how it seems to stop for so long then catch me off guard when I least expect it. I’ve tried saging my house which had no effect at all quite the opposite it seemed to piss off or increase the activity. Somehow placing Christian images does seem to quiet the activity at least temporarily till it begins again.