u/Big_Cardiologist7670

First time attempting!!

What’s the best way for me to level this? It’s incremental throughout the floor. There’s a little more than a 1/8th gap where it meets the wall. I’ also noticed the gap isn’t as big when I use a 4’ surface level.

Do I just use up this thing of Dap patch I have to try to level the low spots?

I know self leveler is an option but I’ve seen mix things about how to use it.. Do I need to caulk all edges and Intersecting boards that it’ll run over?

I’ve watched so many YouTube videos but idk where to start tbh.

Tools I have: orbital sander, electric Planer, wood screws for edges.

I had some rotting wood and tried to cut some of it but did I cut the joist?

I’m DIYIng to put down some LVP and after ripping out the carpet I saw this raised dark spot, assumed it was water damage since it was under the window.. I started cutting it out and I’m second guessing myself now..

Is this real hardwood? The living room and into the kitchen has two different woods... The 2nd picture is the edge(removed trim from fire place). It’s looking like real hardwood to but I can’t tell.

3rd picture is a separate part of the home. I’m not sure about this one.

We plan on refinishing the floors so any recommendations would be greatly appreciated!! We like the look of white oak.

Edit: some pieces I found in the garage:
https://imgur.com/a/09mFXQC

Our brick veneer is reverse sloping towards the house. No damage to the window or water penetration(yet). Is this a necessary repair or are there any alternatives? The home is 23 years old.

https://imgur.com/a/3wZDGDL

We’d prefer it not to face the front door. We were thinking about a 3 step winder but not sure if it’ll be weird with the column placement… clearance from first step and door is 3.8’

Any ideas on what I can do to this stairway would be appreciated!